Related Clues:

• It causes a breakdown
• Pepsin, for one
• Biochemical catalyst
• Food processor
• Digestion aid
• Pepsin, e.g.
• Digestive aid
• Trypsin, e.g.
• Pepsin or lactase
• Catalyst in yeast, for one
• It may cause a breakdown
• Brewing agent
• Catalytic converter?
• Complex protein
• Saliva component