(K, L) ISG qRT-PCR (K) and infection data (L) from primary monocyte-derived macrophages (MDM) infected for 24 h with LPV-treated HIV-1 R9 BaL viruses (0.2 U RT/ml). Data are collated from two donors (represented by circles and squares), n=3. Horizontal line represents the median. For experiments in which the virus dose used was normalised by RT activity, the number of genome copies was also measured by qPCR of virus. This gave dose equivalents of within 2-3 fold of RT equivalents. 