title: Formaldehyde as an active site label of  -chymotrypsin.
mesh_terms: D000085:Acetates; D001665:Binding Sites; D001667:Binding, Competitive; D002384:Catalysis; D055598:Chemical Phenomena; D002621:Chemistry; D002918:Chymotrypsin / Q000037:antagonists & inhibitors; D004952:Esters; D005557:Formaldehyde; D006639:Histidine; D007093:Imidazoles; D007700:Kinetics; D008433:Mathematics; D009578:Nitrobenzenes; D009994:Osmolar Concentration; D013053:Spectrophotometry; D014443:Tyrosine
chemical_list: D000085:Acetates; D004952:Esters; D007093:Imidazoles; D009578:Nitrobenzenes; D005557:Formaldehyde; D014443:Tyrosine; D006639:Histidine; D002918:Chymotrypsin