Factor V and Factor Viii, Combined Deficiency of, 2, also known as factor v and factor viii, combined deficiency of, is related to factor v and factor viii, combined deficiency of, 1 and prothrombin deficiency. An important gene associated with Factor V and Factor Viii, Combined Deficiency of, 2 is MCFD2 (Multiple Coagulation Factor Deficiency 2, ER Cargo Receptor Complex Subunit), and among its related pathways/superpathways are Metabolism of proteins and Vesicle-mediated transport. Affiliated tissues include bone marrow and bone, and related phenotypes are prolonged prothrombin time and prolonged partial thromboplastin time