Cat#:RP-123A;Product Name:Recombinant Influenza A H1N1 Hemagglutinin Protein (HA1 Subunit) (His Tag);Synonym:HA1;Description:A DNA sequence encoding the N-terminal segment (Met 1-Arg 343) of the influenza hemagglutinin (A/Puerto Rico/8/34 (H1N1)) (ABD77675.1), termed as HA1, was fused with a C-terminal polyhistidine tag.;Source:Human Cells;Predicted N Terminal:Asp 18;Molecular Characterization:The secreted recombinant HA1 subunit of influenza A H1N1 HA (A/Puerto Rico/8/1934 (H1N1)) comprises 337 amino acids and has a predicted molecular mass of 38 kDa. As a result of glycosylation, it migrates as an approximately 50-55 kDa band in SDS-PAGE unde;Purity:Greater than 97 % as determined by SDS-PAGE;Endotoxin:< 1.0 EU per ug of the protein as determined by the LAL method;Bioactivity:Please contact us for detailed information;Formulation:Lyophilized from sterile PBS, pH 7.4;Stability:Recombinant Proteins are stable for up to 1 year from date of receipt at -70℃;Reconstitution:Please see related COA for specific instructions.;Storage:Avoid repeated freeze-thaw cycles. In lyophilized state for 1 year (4-8℃); Upon reconstitution under sterile conditions for 2 weeks (4-8℃) or 3 months (-20℃ to -70℃).;