The Dolphin IFN alpha yeast-derived recombinant protein is not tagged and is naturally endotoxin-free. The purity is greater than 98% as visualized by SDS-PAGE analysis. Dolphin IFN alpha applications are for cell culture, ELISA Standard, ELISpot Control, and Western Blot Control. Dolphin IFN alpha yeast-derived recombinant protein can be purchased in multiple sizes. Dolphin IFN alpha Specifications: (Molecular Weight:18.1 kDa) (Amino Acid Sequence:CDLPQTHSLA KTRALMLLRQ MRRISPFSCL KDRNDFGFPQ EAFGGNQFQK AQAIAVVHEM IQQTFQLFST EGSAAAWDET LLDKFCTALY QQLTDLQACL MQEAGLEGTP LLKEDSILAV RKYFHRITVY LQEKKYSPCA WEIVRAEVMR SFSSSRNL). For research use only. Made in the USA.