The recombinant mouse IL-21 protein is expressed in E. coli, whose amino acid sequence is derived from soluble form of mouse IL21 (Q9ES17), (Pro 25-Ser 146) was expressed, with an initial Met at the C-terminus.

The recombinant mouse IL21 consists of 123 amino acids and has a calculated molecular mass of 14.3KDa. It migrates as a 15 kDa band in SDS-PAGE under reducing conditions.

Mouse IL-21 protein measured by its ability to induce Interferon gamma secretion by human natural killer lymphoma NK-92 cells. The ED50 for this effect is typically 4-20 ng/ml.

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Abbkine Scientific Co., Ltd. was founded by a number of scientists and marketing experts in the field of life science in California in 2012. With growing demands from Asia Pacific, it move its headquarters to China. Combining cutting edge technology from United States with China's manufacturing engineering and cost advantages, we aim to provide innovative, high quality assay kits, recombinant proteins, antibodies and other research tools to accelerate life science fundamental research, drug discovery, etc.