Threonine is an alcohol-containing amino acid that can not be produced by metabolism and must be taken in the diet. This amino acid plays an important role along with Glycine and Serine in Porphyrin metabolism. Threonine is incorporated into proteins and enzymes at a molar rate of 6 percent compared to the other amino acids. Methionine is the only sulfur-containing amino acid that is essential for mammals and must therefore b[...]
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