HIV-1 Integrase p31 protein.The E.coli derived recombinant protein is a nonglycosylated polypeptide chain, containing the HIV-1 immunodominant regions from the p31 protein (intergrase)9-289 amino acids, fused with a GST tag at N-terminus.HIV belongs to the retrovirus family, distinguished by possession of a viral reverse transcriptase that transcribes viral RNA into DNA which is integrated into the host-cellgenome.The human immunodeficiency virus (HIV) integrase (IN),one of the three virally encoded enzymes required for HIV-1 replication, must covalently join the viral cDNA into ahost chromosome for productive HIV infection. Purity >95% by SDS-PAGE and HPLC