Sensitivity of rhA3A to lentivirus Vif-mediated degradation. Panel A. SHIV Vif mediates rhA3A degradation. SHIV and SHIVΔvif molecular clones were co-transfected with rhA3G, hA3A, rhA3A or rhA3AΔSVR. At 24 h post-transfection, cells were lysed and proteins were precipitated using methanol. Proteins were separated on a 12%-SDS-PAGE gel and probed using an antibody directed against the HA-tag. All samples were normalized to the amount of β-actin. Panel B. HIV-1 Vif mediates rhA3A degradation. HIV-1 and HIV-1Δvif molecular clones were co-transfected with rhA3G, hA3A, rhA3A and rhA3AΔSVR. In both panels, the blots were stripped and re-probed with an antibody against β-actin. All assays were performed twice.