2.6.1.44 aminooxyacetic acid for some enzyme mutants, sensitivity to trypsin can be ameliorated by addition of pyridoxal 5'-phosphate or aminooxyacetic acid 689026 2.6.1.44 aminooxyacetic acid presence significantly stabilizes enzyme 687769 2.6.1.44 glucagon induced by, isoenzyme 1 is increased in activity 640067