[Addressed modification of the promoter region of DNA in a complex with RNA polymerase by alkylating oligonucleotide derivatives].

Addressed chemical modification of double-stranded DNA unwound with the specific protein has been demonstrated. 4(N-2-chloroethyl-N-methylamino)benzyl-5'-phosphoamides of oligonucleotides d(CG)rC, d(ATCG)rC, d(AATCG)rC, which can serve as primers in the RNA polymerase-catalyzed transcription, alkylated A2 promoter region of pSK-A2 plasmid in its "open" complex with E. coli RNA polymerase.