The Feline Cystatin B yeast-derived recombinant protein is not tagged and is naturally endotoxin-free. The purity is greater than 98% as visualized by SDS-PAGE analysis. Feline Cystatin B applications are for cell culture, ELISA standard, and Western Blot Control. Feline Cystatin B yeast-derived recombinant protein can be purchased in multiple sizes. Feline Cystatin B Specifications: (Molecular Weight: 11.2 kDa) (Amino Acid Sequence: MMCGAPSATQ PATAETQAIA DQVKPQLEEQ ENKKYTTFKA VEFRSQVVAG RNYFIKVQVD DDEFVHIRVF QSLPHENKPL ALSSYQTHKA RHDELAYF). For research use only. Made in the USA.