On Classification of PDZ Domains: A Computational Study
Figure 5
(a) Wavelet coefficients and (b)–(g): wavelet variance vectors for different physiochemical values. Wavelet variance vector is computed by concatenating the wavelet variances for all the levels from to . It is computed for all the 7 physiochemical values of amino acids. And the final feature vector for any PDZ sequence is a concatenation of such wavelet variance vectors. From Figures 5(b)–5(g), it is evident that, for most of the physiochemical properties, the wavelet variance vector has 3 principal components.
(a) Wavelet coefficients of the mapped protein sequence up to level 5 for EIIP value
(b) Wavelet variance vector, for EIIP value, obtained for the input protein sequence
(c) Wavelet variance vector, for isoelectric value, obtained for the input protein sequence
(d) Wavelet variance vector, for composition value, obtained for the input protein sequence
(e) Wavelet variance vector, for polarity value, obtained for the input protein sequence
(f) Wavelet variance vector, for volume value, obtained for the input protein sequence
(g) Wavelet variance vector, for molecular weight value obtained for the input protein sequence
