Specifications Source Human CD44 Protein is expressed from HEK293 with hFc tag at the C-terminal. It contains Gln21-Pro220 & Gln386-Ala427.[Accession | P16070-1] Molecular Weight The protein has a predicted MW of 53.57 kDa. Due to glycosylation, the protein migrates to 70-100 kDa based on SDS- PAGE result. Endotoxin 95% as determined by SDS- PAGE and HPLC Activity ELISA Data: Immobilized Human CD44, hFc Tag at 0.5μg/ml (100μl/Well) on the plate. Dose response curve for Biotinylated Anti-CD44 Antibody, hFc Tag with the EC50 of 17.8ng/ml determined by ELISA. Formulation Supplied as 0.22μm filtered solution in PBS (pH 7.4). Storage The product should be stored at -25~-15℃ for 1 year from date of receipt. 2-7 days, 2 ~8 °C under sterile conditions after reconstitution. 3 months, -25~-15℃ under sterile conditions after reconstitution. Recommend to aliquot the protein into smaller quantities when first used and avoid repeated freeze-thaw cycles. Note 1.Please operate with lab coats and disposable gloves for your safety. 2.This product is for research use only.