PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 14731394-2 2004 Here, we show that flavopiridol, a highly specific P-TEFb kinase inhibitor, dramatically reduces the global levels of Ser2--but not Ser5--phosphorylated CTD at actively transcribed loci on Drosophila polytene chromosomes under both normal and heat shocked conditions. alvocidib 19-31 Serpin 43Ab Drosophila melanogaster 118-122