a sulphur-containing amino acid which occurs in keratins and other proteins, often in the form of cystine, and is a constituent of many enzymes
Today’s NYT Connections Answers Mar 29, #292 - Daily Updates & Hints
Today’s Wordle Answer Mar 29 #1014- NYT Wordle Hints & Updates
NYT Mini Crossword Answers Today - The Mini for Mar 29 Solved