Purity ≥ 99% (SDS-PAGE, reduced) Purified by affinity chromatography. Truncated Recombinant HIV-1 YU2 M-Tropic envelope protein gp41 produced as a fusion protein in an E. coli Expression System. Truncated gp41 protein mol.wt: 25kD. Specificity: H6003-03B binds to HIV-1 converted human serum polyclonal antibodies in ELISA and Western Blot. Applications: Suitable for use in immunization and T-cell activation.