HPV16 E7 mRNA-CK7 interaction in squamous cervical cancer SiHa cell lysate. (A) SDS-PAGE characterization of the silver-stained material bound to and eluted from oligonucleotide-activated beads following incubation with 3T3 (lane 1) or SiHa (lane 2) cell lysate. (B) Western blot analysis of reactivity to MAbs raised against human CK4, CK7, CK14, or CK17 of material bound to and eluted from oligonucleotide-activated beads following incubation with 3T3 (lanes 1) or SiHa (lanes 2) cell lysate. (C and D) Analyses as in panels A and B, respectively, for cell lysates that had been treated with 50 μg of anti-SEQIKA PAbs. (E and F) Analyses as in panels A and B, respectively, for cell lysates that had been treated with 50 μg of anti-REWVKFAKPCRE PAbs.