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 N-terminal His-Avi-Tag, expressed in a HEK293 cell expression system. MW = 20 kDa. This protein is enzymatically biotinylated using Avi-Tag™ technology. This protein runs at a higher molecular weight due to glycosylation. Biotinylation is confirmed to be >90%.