“Kind of acid that is the building block for a protein” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.AMINO is the answer to the New York Times crossword clue “Kind of acid that is the building block for a protein”. It was last seen in the puzzle of November 24, 2025, where it runs at 18 Across and fills 5 squares. It crosses 5 other entries in that grid — those are listed below and are the quickest way to confirm the letters you already have.