level of tRNA N(3)-methylcytidine methyltransferase METTL2B in blood serum (OBA_2042346, an Ontology of Biological Attributes entry) is the amount of a tRNA N(3)-cytidine methyltransferase METTL2B when measured in blood serum. Also known as: blood serum tRNA N(3)-cytidine methyltransferase METTL2B amount.