Abstract
Background:: The primary goal of molecular phylogenetics is to characterize the similarity/ dissimilarity of DNA sequences. Existing sequence comparison methods with some patented are mostly alignment-based and remain computationally arduous. background: The primary goal of molecular phylogenetics is to characterize similarity/dissimilarity of DNA sequences. Existing sequence comparison methods are mostly alignment-based and remain computationally arduous. Objective:: In this study, we propose a novel alignment-free approach based on a previous DNA curve representation without degeneracy. Method:: The method combines two important geometric elements that describe the global and local features of the curve, respectively. It allows us to use a 24-dimensional vector called a characterization vector to numerically characterize a DNA sequence. We then measure the dissimilarity/ similarity of various DNA sequences by the Euclidean distances between their characterization vectors. Results:: we compare our approach with other existing algorithms on 4 data sets including COVID-19, and find that our apporach can produce consistent results and is faster than the alignment-based methods. Conclusion:: The method stated in this study, can assist in analyzing biological molecular sequences efficiently and will be helpful to molecular biologists. other: none
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