Table 2.

Groups of amino acids as defined by Murphy et al. [18].

	#	Groups
${\mathrm{\Sigma }}_{g10}$	10	LVIM, C, A, G, ST, P, FYW, EDNQ, KR, H
${\mathrm{\Sigma }}_{g4}$	4	LVIMC, AGSTP, FYW, EDNQKRH