Programme

P.41 -- Poster, VCTP-45

Date: Tuesday, 13 October 2020

Time: 08:30 - 10:00

The distribution of counterions in a hexagonal DNA lattice within mean field theory

Nguyen Thi Thu Hang (2), Le Thi Hai Yen(2), Tran Thanh Tuyen(1), Nguyen Quang Bau(2), Toan T. Nguyen(1)

(1)Key Laboratory for Multiscale Simulation of Complex Systems, VNU University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai Street, Thanh Xuan, Hanoi, Vietnam. (2) Faculty of Physics, VNU University of Science, Vietnam National University, 334 Nguyen Trai Street, Thanh Xuan, Hanoi, Vietnam

Understanding electrostatics of DNA system is essential for better understanding and design of DNA as a biomaterial and as a biological structure. In this work, we consider the concentration of counterions in a two-dimensional hexagonal lattice of DNAby solving numerically the Poisson-Boltzmann equation within mean-field theoryusing finite element method.Additionally, the dielectric discontinuity of the electric potential at the DNA surfaceis taken into account. The dependence of ion concentrations on the inter-DNA distance in the bundle and the condensation of counterions on the DNA surface are investigated. The effect of the entropic confinement of the ions is also demonstrated.

Presenter: Nguyen Thi Thu Hang