“…After amplification with these generic primers of HPV, the PCR products were submitted to dot blot hybridization. 19 Briefly, the PCR products and controls (plasmid clones harboring various HPV DNAs kindly provided by E.M. deVilliers, DKFZ, Germany and G. Orth, Institute Pasteur, Paris) were denatured with 1.6 N NaOH and 0.1 M ethylenediamine tetraacetic acid, pipetted into nylon membranes under vacuum, and hybridized to ATP 32 -P labeled type specific oligonucleotides independently or in cocktails, including HPV types 6,11,16,18,31,33,34,35,39,40,42,43,44,45, 51, 52, 54, 56, and 58 in cocktails. 19 After hybridization and washing, filters were exposed to X-ray films for 18 -36 hours at Ϫ70°C, with intensifying screens.…”