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Biology 22 Online
OpenStudy (anonymous):

essential amino acids and non essential amino acids

OpenStudy (abhisar):

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OpenStudy (anonymous):

Essential amino acids An essential amino acid or indispensable amino acid is an amino acid that cannot be synthesized de novo (from scratch) by the organism being considered, and therefore must be supplied in its diet. The amino acids regarded as essential for humans are phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine. Additionally, cysteine (or sulphur-containing amino acids), tyrosine (or aromatic amino acids), and arginine are always required by infants and growing children. Essential amino acids are "essential" not because they are more important for protein synthesis or general homeostasis than the others, but because the body does not synthesize them. If they are not uptaken through diet, they will not be available for protein synthesis. In addition, the amino acids arginine, cysteine, glycine, glutamine, proline, serine and tyrosine are considered conditionally essential, meaning they are not normally required in the diet, but must be supplied exogenously to specific populations that do not synthesize them in adequate amounts Non essential Amino acids are those that can be synthesized by the body and are different from essential amino acids that are obtained from food. The term 'nonessential' does not infer that those amino acids are any less important however. The body is simply capable of creating them on its own; therefore it is not necessary for it to attain them from an outside source. These nonessential amino acids serve many functions to create optimal health.

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