Dipeptide Composition

XJ Xiao-Yang Jing
FL Feng-Min Li
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Dipeptide composition (DC) is calculated as the occurrence frequency of each two adjacent amino acid residues. There are 2020 = 400 combinations of amino acid pairs. Compared with AAC, DC is a feature that considers some sequence-order information. It can be calculated as:

Where mi is the occurrence number of i-th dipeptide in protein sequence and L is the length of the protein sequence.

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