cytidine(48) in tRNA(Asp) + S-adenosyl-L-methionine = 5-methylcytidine(48) in tRNA(Asp) + S-adenosyl-L-homocysteine + H(+)
cytidine(48) in trna(asp) + s-adenosyl-l-methionine = 5-methylcytidine(48) in trna(asp) + s-adenosyl-l-homocysteine + h(+)