title: Specific modification of methionine-192 of  -chymotrypsin by an affinity label exploiting the orienting properties of the linear acetylenic group.
mesh_terms: D000438:Alcohols; D000477:Alkylating Agents; D000478:Alkylation; D000480:Alkynes / Q000138:chemical synthesis; D000596:Amino Acids / Q000032:analysis; D001555:Benzene Derivatives; D001665:Binding Sites; D001966:Bromine; D055598:Chemical Phenomena; D002621:Chemistry; D002918:Chymotrypsin / Q000032:analysis / Q000037:antagonists & inhibitors; D004590:Electrophoresis, Paper; D006863:Hydrogen-Ion Concentration; D007659:Ketones / Q000138:chemical synthesis; D007700:Kinetics; D008094:Lithium; D008715:Methionine; D009942:Organometallic Compounds; D010455:Peptides / Q000302:isolation & purification; D011422:Propionates; D011485:Protein Binding; D011714:Pyrans
chemical_list: D000438:Alcohols; D000477:Alkylating Agents; D000480:Alkynes; D000596:Amino Acids; D001555:Benzene Derivatives; D007659:Ketones; D009942:Organometallic Compounds; D010455:Peptides; D011422:Propionates; D011714:Pyrans; D008094:Lithium; D008715:Methionine; D002918:Chymotrypsin; D001966:Bromine