Peptide arised from the V3 loop of Hiv-1 IIIB gp120 efficiently blocked HIV-1 IIIB infection of several T-cell lines and normal human T cells that inhibitis syncytium formation in human cells. It has the capacity to serve as an inducer of HIV-1 specific cytotoxic T lymphocyte responses that could effectively kill virus-infected cells, thereby serving several therapeutic applications. MW: 1656 Da. Purity >98 % purified