combining acid and protein can cause chemical change
protein_kinase_activity is chemical_interaction. cellular_protein_synthesis is chemical_synthesis. change_in_enzyme_activity is chemical_interaction. acid is compound. protein_conformational_change is chemical_interaction. sarin_synthesis is chemical_synthesis. chemical_synthesis is chemical_reaction. protein_family is chemical_substance. change_in_protein_activity is chemical_interaction. breaking_down_proteins is chemical_reaction.