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Citation: SUN Yan-Qing, ZHANG Jian, ZHANG Gao-Yong. Effect of pH on the Interaction Between DNA and N,N-Dimethyldodecylamine N-oxide[J]. Chinese Journal of Applied Chemistry, ;2006, 23(5): 573-575. shu

Effect of pH on the Interaction Between DNA and N,N-Dimethyldodecylamine N-oxide

1.
a State Center for Surfactant Research and Engineering, China Research Institute of Daily Chemical Industry, Taiyuan 030001;
2.
b C₁Chemistry and Chemical Engineering State Key Lab, Taiyuan Science and Technology University, Taiyua

Corresponding author: ZHANG Gao-Yong,
Received Date: 15 July 2005
Available Online: 12 September 2005
Fund Project: 国家自然科学基金(20233010)重点资助项目 (20233010)

The interaction between N,N-dimethyldodecylamine N-oxide(DDAO) and salmon sperm DNA was studied.The Effect of pH on DDAO-DNA complex was investigated via the phase diagram.The hydrophobic interaction between non-ionic species DDAO and DNA was quite weak.At low DDAO concentrations,the cationic species of DDAO(protonated form) could not induce the conformational transformation of DNA either.As the concentration of DDAO was higher than the critical micelle concentration of non-ionic species,electrostatic attraction induced DDAO to combine with DNA strongly and phase separation at critical pH value.
- Interaction,
- DNA,
- N,N-dimethyldodecylamine N,N-oxide(DDAO)
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