Crossword Clue:

an amino acid also CYSTEINE CYSTEIN

AnswerCrossword Clue
ALANINAn amino acid
DOPAAn amino acid
LYSINEAn amino acid
ALANINEAn amino acid: Chem.
LEUCINEAn essential amino acid
PABAInitials for an amino acid.
DOPAAn amino acid, for short