PMID- 1219390 OWN - NLM STAT- MEDLINE DCOM- 19760423 LR - 20130326 IS - 0026-8984 (Print) IS - 0026-8984 (Linking) VI - 9 IP - 3 DP - 1975 May-Jun TI - [The comparative analysis of interaction between acridine orange and DNA-containing systems]. PG - 378-87 AB - The interaction between acridine orange (AO) and diluted and concentrated solutions of DNA, DNP systems and chromatin suspension at the physiologic ionic strength was investigated. The effect of AO on DNP systems was also investigated. It was shown that highest possible number of AO molecules bound to DNA made up 70% of the total number of nucleotides. The model of AO binding to DNA is proposed and used for calculation of constants of stronger and weaker AO-binding capacities equal to 6-10(6) M-1 and 1,7-10(5) M-1, respectively. The AO-DNA binding constants in DNP-complex are five as low. The primary number of binding sites in chromatin suspension made up 10% of the corresponding sites in DNA and increased as AO was adsorbed. AO induced the supercontraction of oriented DNP systems at the physiologic ionic strength and the appearance of the low-temperature melting hump. FAU - Karpukhin, A V AU - Karpukhin AV FAU - Spitkovskii, D M AU - Spitkovskii DM FAU - Fedorova, K N AU - Fedorova KN LA - rus PT - English Abstract PT - Journal Article TT - Sravnitel'nyi analiz vzaimodeistviia akridinovogo oranzhevogo s DNK-soderzhashchimi sistemami. PL - Russia (Federation) TA - Mol Biol (Mosk) JT - Molekuliarnaia biologiia JID - 0105454 RN - 0 (Acridines) RN - 0 (Chromatin) RN - 0 (Deoxyribonucleoproteins) RN - 0 (Indicators and Reagents) RN - 9007-49-2 (DNA) SB - IM MH - *Acridines MH - Binding Sites MH - Chromatin MH - *DNA MH - Deoxyribonucleoproteins MH - *Indicators and Reagents MH - Kinetics MH - Mathematics MH - Osmolar Concentration MH - Protein Binding EDAT- 1975/05/01 00:00 MHDA- 1975/05/01 00:01 CRDT- 1975/05/01 00:00 PHST- 1975/05/01 00:00 [pubmed] PHST- 1975/05/01 00:01 [medline] PHST- 1975/05/01 00:00 [entrez] PST - ppublish SO - Mol Biol (Mosk). 1975 May-Jun;9(3):378-87.