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Related Clues:
- Organic acid type
- Protein constituent, informally
- One type of acid
- The 28-Across in proteins
- Like protein-building acids
- Protein acid type
- With 67 Across, protein building block
- Super-strong glue
- Selection for a seal
- Acid with -NH2
- Bond producer
- Acid variety
- Hard-setting resin
- ___ acids (protein building blocks)
- Bond that's not 007