  Despite the significance of the high flexibility exhibited by short DNAs,
there remains an incomplete understanding of their anomalous persistence
length. In this study, we propose a novel approach wherein each fundamental
characteristic of gene sequences within short DNAs is modeled as a transversely
isotropic ring. Our comprehensive model analysis not only successfully
replicates the observed high flexibility of short DNAs but also sheds light on
the impact of sequence dependence, aligning with experimental findings.
Furthermore, our analysis suggests that the bending behavior of short DNAs can
be effectively described by the Timoshenko beam theory, accounting for shear
considerations.
