STAT1 and STAT5-▵ are constitutively activated in HIV⁺ patients. (A) Supershift analysis using the extract of patient no. 4 of Fig 1, anti-STAT1 rabbit polyclonal Ab, and the different oligonucleotides PRE, GRR, and hSIE/m-67. (B) Supershift analysis using the PRE oligo and 4 different rabbit polyclonal Abs raised against C- (C) or N-terminal (N) epitopes of STAT5a/b proteins.