Protein-building acid crossword clue
15 Across · WSJ Crossword, October 7, 2026 · 5 letters
Explanation
The answer to “Protein-building acid” is AMINO. It appears as 15 Across in the Wall Street Journal crossword of October 7, 2026, a Wednesday puzzle titled “Going Strong” by Ella Dershowitz, and it fills 5 squares running left to right from row 3, column 1 of the 15×15 grid.
The clue is a straightforward definition, so the answer is a direct synonym or a factual match for the words as written. The entry begins with A and ends with O, and contains 3 vowels and 2 consonants. If you are working from the crossings, two or three confirmed letters from the Down entries should be enough to lock it in. Wednesday puzzles sit mid-week on the difficulty curve, so expect the rest of this grid to be pitched at the same level.
Past appearances
Clues in other WSJ puzzles with the answer AMINO:
- Important acid typeSep 16, 2026
- Acid varietySep 2, 2026
- NH2 groupAug 19, 2026
- Important acid typeAug 10, 2026
- Important acid typeJul 6, 2026