trna methylating enzymes isolated from e. coli 113-3 grown in a medium with methionine or s-methylmethionine differed in the activity of transfer of the 14ch3-group from 14ch3-s-adenosyl-l-methionine ( sam ) to trna in the in vitro experiments in heterological systems consisting of trna methyltransferases from e. coli 113-3 and a substrate of methylation , viz . methyl-deficient trna isolated from e. coli k 12w6 .
C0035727
trna methyltransferases
C0025723
methylation