The Feline Cystatin C 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 C applications are for cell culture, ELISA standard, and Western Blot Control. Feline Cystatin C yeast-derived recombinant protein can be purchased in multiple sizes. Feline Cystatin C Specifications: (Molecular Weight: 13.9 kDa) (Amino Acid Sequence: MSPGTGRRNN KSALVGAPLD ADVNEEGVQQ ALNFALSEYN KASNDAYHSR AMRVVRARKQ VVAGMNYFLD VEIGRTRCTK SQPNLDTCPF HDQPHLMRKT LCSFQIYTVP WMGKTSLVKS SCQDA). For research use only. Made in the USA.