Figure 2.
Composition of k-spaced amino acid pairs.
Given 400 (20 × 20) amino acid pairs and five values for k (k = 1–5), there are 2000 attributes generated for the CKSAAP feature. The number of occurrences of each k-spaced amino acid pair is determined by sliding through the fragmented sequence one by one. CKSAAP, composition of k-spaced amino acid pair.