S-Methyl-D-penicillamine is a metabolite of the chelating agent penicillamine .1 It is formed from D-penicillamine by thiol methyltransferase in the membrane fraction of isolated human red blood cells.
1.Keith, R.A., Otterness, D.M., Kerremans, A.L., et al.S-Methylation of D- and L-penicillamine by human erythrocyte membrane thiol methyltransferaseDrug Metab. Dispos.13(6)669-676(1985)
















