What is the answer to "Amino ___ (protein building block)" in the USA Today Crossword?

The answer to the USA Today Crossword clue "Amino ___ (protein building block)" is ACID (4 letters).

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USA

Amino ___ (protein building block) USA Today Crossword Clue

Across clue · from the July 22, 2026 puzzle

Stuck on “Amino ___ (protein building block)” from the USA Today Crossword? Here is the verified answer:

Answer

ACID

4 letters · Across · last seen July 22, 2026

1DBig name in sportswear6 2DVegas venue6 3DFjords and coves6 4DCivil rights activist Ruby3 5ADr. visit4 5DPerson making a scene?5 6D"Sweatpants" singer Faith6 7D___ and proper4 8DJudgy sound3 9DGreen ___ (Marvel supervillain)6 9A"Slimy, yet satisfying" morsel for Timon or Pumbaa4