level of histone-lysine N-methyltransferase, H3 lysine-79 specific in blood serum (Ontology of Biological Attributes identifier OBA_2041346) is the amount of a histone-lysine N-methyltransferase, H3 lysine-79 specific when measured in blood serum. Also known as: blood serum histone-lysine N-methyltransferase, H3 lysine-79 specific amount.