  Using analytical approach and Monte-Carlo (MC) simulations, we study the
elastic behaviour of the intrinsically twisted elastic ribbons with bending
anisotropy, such as double-stranded DNA (dsDNA), in two-dimensional (2D)
confinement. We show that, due to the bending anisotropy, the persistence
length of dsDNA in 2D conformations is always greater than 3D conformations.
This result is in consistence with the measured values for DNA persistence
length in 2D and 3D in equal biological conditions. We also show that in 2D, an
anisotropic, intrinsically twisted polymer exhibits an implicit twist-bend
coupling, which leads to the kink formations with a half helical turn
periodicity along the bent polymer.
