Protein - Protein- Form a major part of mean body tissue,...

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Protein- Form a major part of mean body tissue, totaling about 17% of body weight. Amino acids- building blocks of proteins Proteins are crucial to regulation of the body Body functions such as blood clotting, fluid balance, hormone and enzyme production, visual processes, transport of many substances in the bloodstream, and cell repair require specific proteins Branched-chain amino acids- Amino acids with a branching carbon backbone, these are leucine, isoleucine, and valine. All are essential amino acids. Nonessential amino acids- amino acids that can be synthesized by a health body in sufficiential amino acids. These are also called dispensable amino acids. Semiessential amino acids- amino acids that, when consumed, spare the need to use an essential amino acid for their synthesis. Tyrosine in the diet, for example, spares the need to use phenylalanine for tyrosine synthesis. Also called conditionally essential amino acids. Essential amino acids- the amino acids that cannot be synthesized by humans in sufficient amounts or at all and therefore must be included in the diet; there are nine essential amino acids. These are also called indispensable amino acids . Amino acids are made of mostly carbon, hydrogen, oxygen, and nitrogen Physiological Aspects- The disease phenylketonuria (PKU)- limited ability to metabolize the essential amino acid phenylalline. In PKU diagnosed persons, the enzyme activity may be grossly or mildly insufficient due to the insertion of an incorrect amino acid into the enzyme used in processing phenylaline to tyrosine. When enzymes cannot synthesize
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Protein - Protein- Form a major part of mean body tissue,...

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