The Bee Secapin yeast-derived recombinant protein is not tagged and is naturally endotoxin-free. The purity is greater than 98% as visualized by SDS-PAGE analysis. Bee Secapin applications are for cell culture, ELISA standard, and Western Blot Control. Bee Secapin Specifications: (Molecular Weight: 2.9 kDa) (Amino Acid Sequence: YIIDVPPRCP PGSKFIKNRC RVIVP). For research use only.