Ontology of Biological Attributes entry OBA_2042303 (level of microtubule-associated serine/threonine-protein kinase 4 in blood serum) is the amount of a microtubule-associated serine/threonine-protein kinase 4 when measured in blood serum. Also known as: blood serum microtubule-associated serine/threonine-protein kinase 4 amount.