FIGURE 2.

The 343-dimensional feature composition diagram. (1) Classify 20 amino acids into seven categories and obtain the g1∼g7, as shown in the amino acid classification part. (2) In the 343D vector space composed of seven types of amino acids, the seven amino acids were arranged and combined, resulting in 343 trimmers. (3) Examples of sequence conversion into features. The figure was adapted from the Supplementary Figure in Shen et al. (2007).