Lysin crystal structure from the red abalone Haliotis rufescens (, PDB ID 1ILS). Sites in color are in the (ω≤1, γ≥1) category. Sites that are blue (68,69,96,129) are from the volume and charge partitions. Sites that are red (17,5,27,30,40,73,80,99,101,114,127,131) are from the volume partition only. Finally, sites that are green (97–98) are from the charge partition only.