we have found that a chicken egg lysozyme derivative ( beta-101-lysozyme ) containing an l-isoaspartyl residue at position 101 has a km for methylation by the human erythrocyte l-isoaspartyl/d-aspartyl protein methyltransferase ( ec 2.1.1.77 ) of 183 microm , about 30 times higher than that expected from previous studies with isoaspartyl-containing peptides .
C0025723
methylation
C0025831
methyltransferase