title: A novel 2D graphical representation of DNA sequences and its application.
abstract: In this paper, we introduce a novel 2D graphical representation of DNA sequences, the W-curve, which is embedded in two unit circles. We associate the W-curves with the classifications of the nucleotides according to their chemical properties. Then we obtain an 8-component vector with entries being the average sums of the abscissa and y-axis of A+C and T+G (A+T and C+G, A+G and T+C), respectively. The introduced vector results in simpler characterizations and comparisons of DNA sequences. The construction of the W-curve has some important advantages: (1) it avoids loss of information and the W-curve standing for DNA doesn't overlap or intersect itself; (2) the space the W-curve occupied is very small, just two unit circles. The utility of the approach can be illustrated by the examination of similarities/dissimilarities among the coding sequences of the first exon of beta-globin gene of eleven different species in Table 1.
authors.affiliation: Department of Applied Mathematics, Dalian University of Technology, Dalian 116024, China. lxq785348@163.com
authors.forename: Qi
authors.initials: Q
authors.lastname: Dai
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Liu
authors.forename: Tianming
authors.initials: T
authors.lastname: Wang
mesh_terms: D020029:Base Pairing; D001483:Base Sequence; D003198:Computer Simulation; D004247:DNA / Q000737:chemistry*; D005914:Globins / Q000737:chemistry; D008956:Models, Chemical; D008969:Molecular Sequence Data; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid
chemical_list: D005914:Globins; D004247:DNA