the reactivities of phenylglyoxal ( pgo ) , glyoxal ( go ) , and/or methylglyoxal ( mgo ) with several proteins , including ribonuclease a [ ec 3.1.4.22 ] and its derivatives , alpha-chymotrypsin [ ec 3.4.21.1 ] , trypsin [ ec 3.4.21.4 ] , lysozyme [ ec 3.2.1.17 ] , pepsin [ ec 3.4.23.1 ] , rennin [ ec 3.4.23.4 ] , thermolysin , and insulin and its b chain , have been examined .
C0017992
glyoxal
C0034338
methylglyoxal