Methionine is synthesized from ?
Correct Answer: Cysteine
Description: Ans. is 'a' i.e.,Cysteine Methionine is a sulphar containing amino acid and is synthesized from cysteine.The precursor is homoserine, a product of reduction of aspaic acid.Homoserine is phosphorylated (by ATP) and the phosphate is then displaced by sulfhydryl group of cysteine to form cystathionine.Cleavage of alanine group from cystathionine yields homocysteine, which is methylated to yield methionine.
Category:
Biochemistry
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