How are small ions involved in the compaction of DNA molecules?

@article{Iwaki2007HowAS,
  title={How are small ions involved in the compaction of DNA molecules?},
  author={Takafumi Iwaki and Takuya Saito and Kenichi Yoshikawa},
  journal={Colloids and surfaces. B, Biointerfaces},
  year={2007},
  volume={56 1-2},
  pages={126-33}
}
DNA is a genetic material found in all life on Earth. DNA is composed of four types of nucleotide subunits, and forms a double-helical one-dimensional polyelectrolyte chain. If we focus on the microscopic molecular structure, DNA is a rigid rod-like molecule. On the other hand, with coarse graining, a long-chain DNA exhibits fluctuating behavior over the whole molecule due to thermal fluctuation. Owe to its semiflexible nature, individual giant DNA molecule undergoes a large discrete transition… CONTINUE READING