Related Clues:

• Kind of acid in protein
• Kind of acid synthesized to produce aspartame
• Corrosive acid
• Protein building block, for short
• -- acid (a B vitamin)
• __ acids (protein building block)
• Protein acid, for short
• Another 46-Across
• __ acid (B vitamin)
• Alpha-___ acid
• ___ acid (protein component)
• Acid head?
• Protein acid, informally
• Vitamin B acid
• Type of acid found in proteins