The Feline EGF 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 EGF applications are for cell culture, ELISA standard, and Western Blot Control. Feline EGF yeast-derived recombinant protein can be purchased in multiple sizes. Feline EGF Specifications: (Molecular Weight: 6.2 kDa) (Amino Acid Sequence: NSYQECPPSY DGYCLYNGVC MYIEAVDRYA CNCVFGYVGE RCQHRDLKWE LR (52)) (Gene ID: 493978). For research use only. Made in the USA