Analysis of the contribution of the CCR5 mAb and FI components within the sequential steps of viral fusion in synchronized viral infection experiments further demonstrated activity of the fusion peptides, as BFFI showed viral inhibition closer to the fusion peptide component alone with measurable times of 40 and 48 minutes respectively in comparison to the CCR5 mAb alone, which was measured at 18 minutes. The gene discussed is CCR5; the disease is viral infectious disease.