Crossword Clue:

CYSTEINE an amino acid also CYSTEIN CYSTINE

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