Human APRIL, also known as A proliferation-inducing ligand, TNFSF13, and tumor necrosis factor ligand superfamily member 13, GenBank Accession No. NM_003808, a.a. 105-250 with an N-terminal His-Avi-Tag™, expressed in a HEK293 cell expression system. MW = 20 kDa. This protein runs at a higher molecular weight due to glycosylation.