<p><b>Copyright information:</b></p><p>Taken from "Inhibition of HIV-1 replication by P-TEFb inhibitors DRB, seliciclib and flavopiridol correlates with release of free P-TEFb from the large, inactive form of the complex"</p><p>http://www.retrovirology.com/content/4/1/47</p><p>Retrovirology 2007;4():47-47.</p><p>Published online 11 Jul 2007</p><p>PMCID:PMC1948018.</p><p></p> Untreated HeLa cells and HeLa cells treated for 1 hour with 100 μM DRB were lysed with a buffer containing the indicated amounts of NaCl to generate cytosolic extracts (CE). The CE and the nuclear pellet (NP) were examined by immunoblotting with the indicated antibodies for the presence of P-TEFb or the TFIIH components p62, Cdk7 and cyclin H