2.1.1.225 S-adenosyl-L-methionine + adenosine4 in tRNAHis the enzyme is necessary and sufficient for 2'-O-methylation at position 4 of yeast tRNA. 2'-O-methylation in the acceptor stem of tRNA 2.1.1.225 S-adenosyl-L-methionine + cytidine4 in tRNAGly(GCC) the enzyme is necessary and sufficient for 2'-O-methylation at position 4 of yeast tRNA. 2'-O-methylation in the acceptor stem of tRNA 2.1.1.225 S-adenosyl-L-methionine + cytidine4 in tRNAPro the enzyme is necessary and sufficient for 2'-O-methylation at position 4 of yeast tRNA. 2'-O-methylation in the acceptor stem of tRNA