Human APRIL (TNFSF13) is a cytokine of the tumor necrosis factor family that binds to receptors TNFRSF13B/TACI and TNFRSF17/BCMA, playing a critical role in the generation and maintenance of mature B-lymphocytes. This active homotrimer protein is expressed in human HEK293 cells and contains a polyhistidine tag followed by a flag tag at the N-terminus. It is lyophilized from a 0.22 μm filtered solution in PBS at pH 7.4 with trehalose as a protectant.
- Calculated molecular weight of 50.2 kDa with a migration of 55-60 kDa on non-reducing SDS-PAGE due to glycosylation
- Purity >95% as determined by both SDS-PAGE and SEC-MALS
- Endotoxin levels <0.01 EU per μg via LAL or rFC method
- Verified bioactivity for BCMA and TACI binding via ELISA and BLI assays
- 100% sequence coverage verified by LC-MS/MS peptide mapping