Characteristic length scale of electric transport properties of genomes

A tight-binding model together with a statistical method are used to investigate the relation between the sequence-dependent electric transport properties and the sequences of protein-coding regions of complete genomes. A correlation parameter Ω is defined to analyze the relation. For some particular propagation length w_max, the transport behaviors of the coding and noncoding sequences are very different and the correlation reaches its maximal value Ω_max. w_max and Ω_max are characteristic values for each species. A possible reason for the difference between the features of transport properties in the coding and noncoding regions is the mechanism of DNA damage repair processes together with natural selection.