Crossword clue
“Protein-building acid”
This clue appeared as 15-Across in the WSJ Crossword on Wednesday, October 7, 2026. The answer has 5 letters.
Answer · 5 lettersFirst appearance
AMINOLetters5
Starts withA
Ends withO
Vowels3
Where this clue has appeared
About this clue
The clue “Protein-building acid” ran in the WSJ Crossword on October 7, 2026 as 15-Across. Its answer is a 5-letter word that starts with A and ends with O, with 3 vowels, which often points to a phrase, a name or a borrowed word.
See every answer from the puzzle on the WSJ Crossword page for October 7, 2026, or learn how clues like this work in our guide to crossword clue types.
More clues from this puzzle
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FAQ
What is the answer to the “Protein-building acid” clue?+
The answer is AMINO (5 letters), from the WSJ Crossword of October 7, 2026.
Where has this clue appeared?+
We have seen it 1 time in the WSJ Crossword.
How do I find other WSJ Crossword answers?+
Open the full list of answers for October 7, 2026, or browse every date on the WSJ Crossword hub.