based on the low stoichiometry ( less than 100 pmol/mg protein ) of the methylation , its base lability , irreversibility , and the lack of substrate specificity except at very low concentrations of methyl donor , it was inferred that the chloroplast methyltransferase is best classified as a class ii system that may function as part of a repair mechanism to replace racemized amino acids .
C0025723
methylation
C0025831
methyltransferase