. "Catalysis of the reaction: S-adenosyl-L-methionine + tRNA = S-adenosyl-L-homocysteine + tRNA containing 3-methylcytosine." . . "tRNA (cytosine-3-)-methyltransferase activity" . "S-adenosyl-L-methionine:tRNA (cytosine-3-)-methyltransferase activity" . "S-adenosyl-L-methionine:tRNA cytosine-3-methyltransferase activity" . "transfer ribonucleate cytosine 3-methyltransferase activity" . "tRNA (cytosine 3)-methyltransferase activity" . "tRNA cytosine 3-methyltransferase activity" . "tRNA cytosine-3-methyltransferase activity" . . . . . . . .