How proteins in the diet are disassembled and then reassembled to form Essay

How proteins in the diet are disassembled and then reassembled to form useful proteins in the body - Essay Example These enzymes are dipeptidases, carboxypeptidase and aminopeptidase. Since the intestinal absorption of proteins is only possible in amino acid form and peptide form so they must be broken down into amino acids and peptides. These absorbed peptides are dipeptides and tripeptides. After absorption they are transported into the cells by various transporters and channels depending upon the internal environment. Up till now, all the disassembly of proteins is extracellularly done. After this, the entire breakdown is done inside the cell called intracellular protein degradation. Inside the cell, they are taken by phagocytosis; the food vacuole is fused with lysosome. The lysosomal enzymes further degrade di and tri peptides into amino acids. Different digestive enzymes have different specificity towards their substrate. For example trypsin cleaves positively charged residue including arginine and lysine. Similarly, chymotrypsin cleaves the aromatic residues consisting of tyrosine, phenyla lanine and tryptophan. Elastase breaks the bond of small non-polar residues (alanine and glycine). If these digestive enzymes are activated without any stimulus (as protein in the diet is the stimulus for their secretion), it will lead to auto-digestion of the pancreas leading to pancreatitis, that’s why they are always secreted in an inactivated form. This inactivated form is called zymogen. Zymogen for trypsin is called as trypsinogen. It is activated by enzyme enterokinase (secreted by duodenal mucosa). Pepsin is also secreted in an inactivated form as it leads to auto-digestion of stomach. That inactivated form is called as pepsinogen which is activated in an acidic medium. The pancreas secretes the precursors of a number of proteases, such as trypsin and chymotrypsin. The intracellular degradation of protein results in the formation of amino acids. They are also degraded by ubiquitin system. After entering in the blood, amino acids are used for several purposes. One of t hem is also the formation of proteins for the body. Protein is also a structural component of cells. Plasma membrane and membranes of cellular organelles is also made of proteins. So amino acids in the blood are used for the protein formation. It is a complicated process. Any mistake or error in this can lead to many diseases as discussed in the end of this essay. The assembly of proteins is called as Protein biosynthesis. It is called as Translation which involves the assembly of proteins. Translation is only possible if mRNA is available and it is formed by the process called translation. The reassembly involves two processes transcription and translation. In transcription an mRNA is generated. It is template of one strand of double helix DNA. Transcription involves three steps: initiation of mRNA, elongation of mRNA chain and termination of transcription. Each and every step is regulated by a large number of proteins. These are transcription factors co-factors and coactivators. T heir major function is to ensure that the correct and required sequence of gene is transcribed. The process of transcription occurs in the nucleus. The double helix DNA is "unzipped" or opened by the breakdown of hydrogen bonds between the two strands by helicase. Primer attaches to the site and is followed by an initiator. Then elongation of the chain occurs by placing nitrogenous bases. The bonding occurs between adenine and uracil and guanine and cytosine.

Assignment Example | Topics and Well Written Essays - 1250 words - 3

Assignment Example However, their points of view starkly contrast each other. Kaplan chooses to explain globalization as a part of the ability of a nation to find areas within their own economic systems that will allow their natural resources and geographic location to dictate the speed and method by which the country shall modernize its infrastructure and business models. These business models however, are based mostly on the basis of the religion or ethnicity of the region in order to play up on the strengths of the people inhabiting particular locations. Although Kaplan's belief makes sense, since it allows a section of the population to advance socially and economically, it has its own drawbacks and failures as well. The main problem with Kaplan's point of view is that it dooms the divisions within a country, its states, to an interdependence that does not allow room for improvement should other states in the country fail to reach its full potential based upon the ethnic and religious climate in th at region. In effect, Kaplan wants us to believe that if a particular portion / sector of economics in a society functions poorly or ceases to function in totality, then the whole state and its adjoining areas should be seen as failures as well. All states that are located within the same vicinity can be assumed to be failing simply because one portion of the economic sector in that area failed to live up to is full potential. As we all know, such a theory cannot be based upon the reality of any modern situation as all businesses, though interdependent, allows for other entities within their sectors to evolve in order to deal with the impending failure of other sectors. Just because one sector fails does not mean that all the members of that particular business chain shall fail as well. Rather, the failure of one area allows for the growth and evolution of the others within the chain. This is a point of view that, although explained in a highly convoluted way by Wright, his theory p ertaining to Globalization seems to support to a certain degree. In Wright's opinion, Globalization is a business movement that can only be spread far and wide provided that a â€Å"natural leader of a moral revolution† can be found. In his personal opinion, that natural leader can be found in only one country, the United States of America. Basing his beliefs upon the historical fact that America has been leading the world in more ways than one since World War I, he advocates the theory that America must spread globalization but it can only be accurately done so provided America takes on the role of conqueror on a global scale. This is something that he believes in even though he admits to himself and to his readers that globalization actually began far longer that we all thought. It actually dates back to prehistorical times, when technology was in its infancy and the invention of the wheel, the cart, and the use of animals to help move trade from town to turn was actually t hought to have began to modernization of business. The failure of Wirght's belief in America as the de-facto leader in Globalization lies in the fact that he did not take into account the potential for the American economy itself to find itself in a death spiral, thus allowing for other countries, such as China, Korea, and other emerging Asian markets, to finally take their places on the world

Contruction & analysis Exercises Essay Example | Topics and Well Written Essays - 1250 words

Contruction & analysis Exercises - Essay Example The curtains flapped about in the draught caused by a carelessly half-closed window. And on the floor, to the left of the chairs lay Jerry Pinto, very, very quiet.in fact, very, very dead Mary Pinto entered the room. She had a tranquil air about her; her skin looked translucent, her mouth was soft, and her eyes large and dark, giving her an appealing wide-eyed look. She was six months into her pregnancy-a fact barely discernible on her slight figure. Mary deposited her shopping bag on the sideboard next to the half empty glasses, humming a tune, and smiling to herself. "Jerry, how are you, darling" she said with genuine affection, in the direction of where she expected him to be sitting Not hearing his reply she turned around, and stood stupefied for a momentonly for a momentthen she ran to where he lay fallen on the floor. She seemed somehow to understand, as soon as she saw him, that he was dead. Perhaps it was the way he lay. In that strange and stiff fashion She ran over to him and sat down by his side, gently lifting up his head, cradling it in her lap. The sobs came hesitant and rasping at first, but louder and more abandoned as the moments passed. She must have sat thus, for what seemed like an age to her. But it must have been no more than five minutes Mary suddenly stopped crying, and wiped her eyes. ... The voice at the other end was familiar " Quick! Come quick! I think Jerry's dead!" said Mary into the receiver " Mrs. Pinto yes Mrs. Mary Pinto here. I think so. He's lying on the floor, and I think he's dead" she said, as her voice caught on another sob. The call over, she busied herself in the room, moving here and there, straightening up the furniture, trying not to look where it layItHe was it now. No longer Jerry. Before long, Mary heard the sound of a car. Even before the knock, she was at the door to open it. Two plains clothes men stood there. She knew them wellthey were Jerry's colleagues after all. On seeing them, Mary suddenly felt the tears start again. James Hendricks, the young officer who had joined the force only recently was plainly moved. He helped Mary gently to a chair. Aneez Afzal, the other cop, a veteran, kept his face expressionless. But as he moved towards Jerry, it crumbled for a moment in an expression of grief and despair. Jerry was his colleague and friend, and they'd been working together for the last five years "Is he dead " Mary managed to ask. "I'm afraid so", replied Afzal. "Tell us what happened, Mrs. Pinto. Where were you, and how long back did this happen" "You know, how punctual Jerry is", said Mary. "He had just returned from the police station by 5.30, as usual. I was sitting here with my sewingI hadn't cooked any dinner today. You know, every Wednesday we go out for dinner. But Jerry was so tired"Her breath caught on a sob again, and she took some time to compose herself. "I thought it better to have dinner at home. I put a leg of lamb in the oven, and nipped across to Vipul's, you know, Vipul's the Indian store down the road I didn't have any vegetables at home. I left Jerry to unwind over a drink. I was hardly away

How proteins in the diet are disassembled and then reassembled to form Essay

How proteins in the diet are disassembled and then reassembled to form useful proteins in the body - Essay Example These enzymes are dipeptidases, carboxypeptidase and aminopeptidase. Since the intestinal absorption of proteins is only possible in amino acid form and peptide form so they must be broken down into amino acids and peptides. These absorbed peptides are dipeptides and tripeptides. After absorption they are transported into the cells by various transporters and channels depending upon the internal environment. Up till now, all the disassembly of proteins is extracellularly done. After this, the entire breakdown is done inside the cell called intracellular protein degradation. Inside the cell, they are taken by phagocytosis; the food vacuole is fused with lysosome. The lysosomal enzymes further degrade di and tri peptides into amino acids. Different digestive enzymes have different specificity towards their substrate. For example trypsin cleaves positively charged residue including arginine and lysine. Similarly, chymotrypsin cleaves the aromatic residues consisting of tyrosine, phenyla lanine and tryptophan. Elastase breaks the bond of small non-polar residues (alanine and glycine). If these digestive enzymes are activated without any stimulus (as protein in the diet is the stimulus for their secretion), it will lead to auto-digestion of the pancreas leading to pancreatitis, that’s why they are always secreted in an inactivated form. This inactivated form is called zymogen. Zymogen for trypsin is called as trypsinogen. It is activated by enzyme enterokinase (secreted by duodenal mucosa). Pepsin is also secreted in an inactivated form as it leads to auto-digestion of stomach. That inactivated form is called as pepsinogen which is activated in an acidic medium. The pancreas secretes the precursors of a number of proteases, such as trypsin and chymotrypsin. The intracellular degradation of protein results in the formation of amino acids. They are also degraded by ubiquitin system. After entering in the blood, amino acids are used for several purposes. One of t hem is also the formation of proteins for the body. Protein is also a structural component of cells. Plasma membrane and membranes of cellular organelles is also made of proteins. So amino acids in the blood are used for the protein formation. It is a complicated process. Any mistake or error in this can lead to many diseases as discussed in the end of this essay. The assembly of proteins is called as Protein biosynthesis. It is called as Translation which involves the assembly of proteins. Translation is only possible if mRNA is available and it is formed by the process called translation. The reassembly involves two processes transcription and translation. In transcription an mRNA is generated. It is template of one strand of double helix DNA. Transcription involves three steps: initiation of mRNA, elongation of mRNA chain and termination of transcription. Each and every step is regulated by a large number of proteins. These are transcription factors co-factors and coactivators. T heir major function is to ensure that the correct and required sequence of gene is transcribed. The process of transcription occurs in the nucleus. The double helix DNA is "unzipped" or opened by the breakdown of hydrogen bonds between the two strands by helicase. Primer attaches to the site and is followed by an initiator. Then elongation of the chain occurs by placing nitrogenous bases. The bonding occurs between adenine and uracil and guanine and cytosine.

Contruction & analysis Exercises Essay Example | Topics and Well Written Essays - 1250 words

Contruction & analysis Exercises - Essay Example The curtains flapped about in the draught caused by a carelessly half-closed window. And on the floor, to the left of the chairs lay Jerry Pinto, very, very quiet.in fact, very, very dead Mary Pinto entered the room. She had a tranquil air about her; her skin looked translucent, her mouth was soft, and her eyes large and dark, giving her an appealing wide-eyed look. She was six months into her pregnancy-a fact barely discernible on her slight figure. Mary deposited her shopping bag on the sideboard next to the half empty glasses, humming a tune, and smiling to herself. "Jerry, how are you, darling" she said with genuine affection, in the direction of where she expected him to be sitting Not hearing his reply she turned around, and stood stupefied for a momentonly for a momentthen she ran to where he lay fallen on the floor. She seemed somehow to understand, as soon as she saw him, that he was dead. Perhaps it was the way he lay. In that strange and stiff fashion She ran over to him and sat down by his side, gently lifting up his head, cradling it in her lap. The sobs came hesitant and rasping at first, but louder and more abandoned as the moments passed. She must have sat thus, for what seemed like an age to her. But it must have been no more than five minutes Mary suddenly stopped crying, and wiped her eyes. ... The voice at the other end was familiar " Quick! Come quick! I think Jerry's dead!" said Mary into the receiver " Mrs. Pinto yes Mrs. Mary Pinto here. I think so. He's lying on the floor, and I think he's dead" she said, as her voice caught on another sob. The call over, she busied herself in the room, moving here and there, straightening up the furniture, trying not to look where it layItHe was it now. No longer Jerry. Before long, Mary heard the sound of a car. Even before the knock, she was at the door to open it. Two plains clothes men stood there. She knew them wellthey were Jerry's colleagues after all. On seeing them, Mary suddenly felt the tears start again. James Hendricks, the young officer who had joined the force only recently was plainly moved. He helped Mary gently to a chair. Aneez Afzal, the other cop, a veteran, kept his face expressionless. But as he moved towards Jerry, it crumbled for a moment in an expression of grief and despair. Jerry was his colleague and friend, and they'd been working together for the last five years "Is he dead " Mary managed to ask. "I'm afraid so", replied Afzal. "Tell us what happened, Mrs. Pinto. Where were you, and how long back did this happen" "You know, how punctual Jerry is", said Mary. "He had just returned from the police station by 5.30, as usual. I was sitting here with my sewingI hadn't cooked any dinner today. You know, every Wednesday we go out for dinner. But Jerry was so tired"Her breath caught on a sob again, and she took some time to compose herself. "I thought it better to have dinner at home. I put a leg of lamb in the oven, and nipped across to Vipul's, you know, Vipul's the Indian store down the road I didn't have any vegetables at home. I left Jerry to unwind over a drink. I was hardly away

Debt and Equity Essay Example for Free

Debt and Equity Essay Long-term financing requires a meticulous understanding of the various features of debt and equity and their impact an organization. While evaluating debt and equity, an investment banker also has to consider the unique characteristics of the organizations dealings while ensuring that the organizations requirements are met. Debt CapitalDebt capital includes all long-term borrowing incurred by the firm. The cost of debt was found to be less than the cost of other forms of financing. The relative inexpensiveness of debt capital is because the lenders take the least risk of any long-term contributors of capital. Their risk is less than that of other because (1) they have a higher priority of claim against any earnings or assets available for payment (2) they have a far stronger legal pressure against the company to make payment than do preferred or common stockholders, and (3) the tax-deductibility of interest payments lowers the debt cost to the firm substantially. Equity CapitalEquity capital consists of the long-term funds provided by the firms owners, the stockholders. Unlike borrowed funds that must be repaid at a specified future date, equity capital is expected to remain in the firm for an indefinite period. The two basic sources of equity capital are (1) preferred stock and (2) common stock equity, which includes common stock and retained earnings. Common stock is typically the most expensive form of equity, followed by retained earnings and preferred stock, respectively (Pinegar, Wilbricht, 1989). A firms capital structure is determined by the mix of long-term debt and equity it uses in financing its operations. Debt and equity capital differ with respect to voice in management, claims on income and assets, maturity, and tax treatment. Capital structure can be externally assessed using the debt ratio and the debt-equity ratio to measure the firms degree of indebtedness or the times interest earned ratio and the fixed-payment coverage ratio to measure its ability to meet fixed financial payments. Research suggests is an optimal capital structure that balances the firms; benefits and cost of debt financing. The major benefit of debt financing is the tax-deductible interest, and the costs of debt financing include the  probability of bankruptcy, agency costs imposed by lenders in their loan agreements, and asymmetric information costs attributable to managers having more information about the firms prospects than do investors (Modigliani and Miller, 1958). Reference: Modigliani, Franco and Miller, Merton. (1958). The Cost of Capital, CorporationFinance, and the Theory of Investment. American Economic Review. Pinegar, J. Michael and Wilbricht, Liza. (1989). What Managers Think of CapitalStructure Theory.

Give Peace a Chance

Give Peace a Chance Give Peace a Chance John Lennon was a singer, songwriter, musician, author and peace activist who was also one of the founding members of The Beatles. He died tragically on December 8, 1980 in New York City, New York. Lennon was shot and killed by Mark David Chapman at the entrance of the Dakota apartment building where he resided. Chapman was charged with murder and received a prison sentence of twenty years to life. He has been up for parole five times, which has been denied each time. Chapman remains at Attica State Prison in New York. John Lennons assassination shocked the world. The world had lost a great musician. Born on October 9, 1940 in Liverpool, England, Lennon had taken an interest in music at an early age. At seventeen, he formed a band called The Quarrymen that eventually became The Beatles. The Beatles looked to Lennon as their group leader. As Paul McCartney, a fellow band member stated, â€Å"We all looked up to John. He was older and he was very much the leader- he was the quickest wit and the smartest and all that kind of thing† (Goldman 672).From 1957 until 1964, the Beatles toured all over Europe. The group first appeared in the United States in February 1964. After their performance on The Ed Sullivan Show, The Beatles toured nonstop for two years, holding concerts, making movies, and writing hit songs. In 1969, the group split up and John Lennon began working on his first solo album. Throughout the 1970s, Lennon produced multiple hits and he had a successful solo career. He also recorded several albums with his wife, Yoko One, a Japanese-American woman who was several years older than Lennon. He had two sons, Julian from a previous marriage and Sean with Yoko Ono. Mark David Chapman was born in 1955, the son of a military family that moved around his entire childhood. He was bullied and teased at every school he attended. â€Å"He sought refuge in an imaginary world of little people where he achieved affection and the feeling of power† (Norman, 804). In his early teen years, Chapman experimented with drugs, but he later became a devout Christian. He went on to work for several worthwhile causes that Lennon would have approved- a YMCA program for Vietnamese people and he also spent time in Beirut during the Lebanese Civil War (Norman 804). At age 22, he began having psychiatric problems and attempted suicide. In 1979, he married a Japanese-American woman several years older than himself, much like Lennon. Chapman eventually developed a series of obsessions including John Lennon and the book The Catcher in the Rye. Chapman particularly obsessed about Holden Caulfield, the main character in the book. He believed that â€Å"if he put an e nd to John Lennon, he would be able to step into the books pages and become Holden Caulfield† (Norman, 805). His main comfort in his joyless life was Beatles music. On Friday, December 5, 1980, Mark David Chapman flew from his home in Honolulu, Hawaii to New York with a backpack and fourteen hours of Beatles music on cassettes. He checked into a YMCA and bought a copy of Double Fantasy, the latest album by John Lennon. Chapman left his copy of J.D. Salingers book The Catcher in the Rye at home in Hawaii, so he purchased a new copy in New York. His plan was to shoot John Lennon at that time, but instead just took some pictures. Chapman spent most of the weekend outside the Dakota talking to the many fans that always stood around hoping to get a glimpse of Lennon, but he did not see John Lennon until Sunday. On Monday, December 8, Chapman returned to the Dakota around noon. John left his building around 4 p.m., and Chapman was planning once again to shoot Lennon. This time, Lennon autographed Chapmans Double Fantasy album, Chapman hesitated when Lennon kindly asked, â€Å"Is that all you want?† This caught Chapman off guard and he could no t go through with his current plan. Later that evening, at 10:49 p.m., Lennon returned to his home. Lennon headed to the entrance of the Dakota. Chapman walked towards Lennon and was holding his autographed copy of Double Fantasy. He softly called, â€Å"Mr. Lennon† and produced a .38 caliber handgun, firing five shots. Within minutes, police arrived at the scene and took Lennon to Roosevelt Hospital. He was pronounced dead at 11:07 p.m. Police found Chapman leaning against the bricks outside the Dakota calmly reading The Catcher and the Rye. His gun and the Double Fantasy album were on the ground nearby. The inside book cover read â€Å"This is my statement† (Jones 22). â€Å"This† was underlined, it was signed â€Å"Holden Caulfield,† and The Catcher in the Rye was written underneath. Lennon was assassinated by a man similar to himself. â€Å"Both were troubled, self-absorbed, and emotionally unfulfilled children. Each came separately of age- Lennon in the rubble of post World War II England, and Chapman in the midst of Americas decade long war in Vietnam-in a confused and hypocritical world† (Jones 2). Both sought out music, art, drugs, and religion (Jones 1). Chapman was angered by Lennons infamous remark in 1966 that The Beatles were â€Å"bigger then Jesus.† Chapmans was obsessed with the theme of phoniness from The Catcher in the Rye. It was suggested that Chapman wanted to kill Lennon because he viewed him as a phony. Chapman later said that he felt the murder would turn him into Holden Caulfield. Both John Lennon and his assassin, Mark David Chapman, have surprised and forever altered history. Ironically Lennon had given an interview on the say of his assassination where he said that he felt safe enough to walk anywhere in the city. He was a simple man who wanted only peace and love in the world. These ideals where shown in his music and songwriting. His assassination robbed the world of a talented musician.