Heterogeneity of Signal Transducer and Activator of Transcription Binding Sites in the Long-Terminal Repeats of Distinct HIV-1 Subtypes

Fig. (4) GM-CSF activates STAT5 binding to the HIV-1 LTR subtype G in U937 cells. WCE from either unstimulated or GM-CSF stimulated U937 cells were incubated with radiolabeled oligonucleotides. A 100-fold excess of unlabeled LTR-subtype G was added in lane 4.