The Human IL-31 yeast-derived recombinant protein is not tagged and is naturally endotoxin-free. The purity is greater than 98% as visualized by SDS-PAGE analysis. Human IL-31 applications are for cell culture, ELISA standard, and Western Blot Control. Human IL-31 yeast-derived recombinant protein can be purchased in multiple sizes. Human IL-31 Specifications: (Molecular Weight: 15.8 kDa) (Amino Acid Sequence: SHTLPVRLLR PSDDVQKIVE ELQSLSKMLL KDVEEEKGVL VSQNYTLPCL SPDAQPPNNI HSPAIRAYLK TIRQLDNKSV IDEIIEHLDK LIFQDAPETN ISVPTDTHEC KRFILTISQQ FSECMDLALK SLTSGAQQAT T (141)) (Gene ID: 386653). For research use only. Made in the USA