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Discussion Starter · #1 ·
Amino acids that contribute at least one nitrogen or carbon to the purine ring during the biosynthesis of purine nucleotides are ;

a. alanine, asparagine, and lysine
b. alanine, methionine, and histidine
c. aspartate, arginine, and histidine
d. aspartate, glycine, and glutamine
e. glycine, serine, and tyrosine
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