Description: Recombinant Human SPESP1 Protein is produced by mammalian expression system and the target gene encoding Tyr20-Tyr350 is expressed with a 6His tag at the C-terminus. Form: Lyophilized from a 0.2 μM filtered solution of 20mM PB, 150mM NaCl, pH 7.4. Gene Symbol: SPESP1 Alternative Names: Sperm equatorial segment protein 1; ESP; Equatorial segment protein; SP-ESP; Glycosylated 38 kDa sperm protein C-7/8Entrez Gene (Human): 246777SwissProt (Human): Q6UW49Purity : Greater than 95% as determined by reducing SDS-PAGE.Chemical Structure : YPSITVTPDE EQNLNHYIQV LENLVRSVPS GEPGREKKSN SPKHVYSIAS KGSKFKELVT HGDASTENDV LTNPISEETT TFPTGGFTPE IGKKKHTEST PFWSIKPNNV SIVLHAEEPY IENEEPEPEP EPAAKQTEAP RMLPVVTESS TSPYVTSYKS PVTTLDKSTG IGISTESEDV PQLSGETAIE KPEEFGKHPE SWNNDDILKK ILDINSQVQQ ALLSDTSNPA YREDIEASKD HLKRSLALAA AAEHKLKTMY KSQLLPVGRT SNKIDDIETV INMLCNSRSK LYEYLDIKCV PPEMREKAAT VFNTLKNMCR SRRVTALLKV YVDHHHHHH Directions for Use : Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100 μg/ml. Dissolve the lyophilized protein in 1X PBS. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.Quality Control : Endotoxin: Less than 0.1 ng/μg (1 IEU/μg) as determined by LAL test.Storage/Stability : Lyophilized protein should be stored at -20°C, though stable at room temperature for 3 weeks. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at -20°C for 3 months.