Description：Recombinant COVID-19 Envelope Protein is produced by E.coli expression system and the target gene encoding Met1-Val75 is expressed with a beta-barrel platform protein, 6His tag at the N-terminus.Form：Liquid in a 0.2 μm filtered solution of 20mM Tris-HCl, 200mM NaCl, pH 8.0.Alternative Names：2019-nCoV E protein; 2019-nCoV sM protein Entrez Gene (Human)： QHD43418.1; Purity：Greater than 95% as determined by reducing SDS-PAGE.Chemical Structure：MYSFVSEETG TLIVNSVLLF LAFVVFLLVT LAILTALRLC AYCCNIVNVS LVKPSFYVYS RVKNLNSSRV PDLLVDirections for Use：Please minimize freeze-thaw cycles.Quality Control：Endotoxin: Less than 0.1 ng/µg (1 IEU/µg) as determined by LAL test.Storage/Stability：Store it at -20°C to -80°C for one year. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.