Answer
Although tyrosine and cysteine are non-essential amino acids, their precursors are essential amino acids that must be taken up from one's diet. Tyrosine and cysteine production rely on the presence of phenylalanine and methionine, respectively.
Work Step by Step
Although tyrosine and cysteine are non-essential amino acids, their precursors are essential amino acids that must be taken up from one's diet. Tyrosine and cysteine production rely on the presence of phenylalanine and methionine, respectively.
