A 56-year-old man with long-standing poorly controlled diabetes mellitus visits his primary care physician for a follow-up after recent hospitalization. The patient experienced an episode of acute renal failure while in the hospital and his creatinine level rose to 4 mg/dl. Creatinine, a marker of renal function is produced from which of the following precursors ?
a) Glutamine, Aspartic acid and alanine
b) Glutamine, Cysteine and Glycine
c) Serine , Glycine and Methionine
d) Glycine, Arginine and Methionine
e) Glutamic acid, Cysteine and Glycine
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