Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1k94A 3mzvA 4by6E 4by6F 1k94A 100 50 0 0 3mzvA 26 100 78 83 4by6E 0 81 100 80 4by6F 0 83 86 100 FOLD SIMILARITY (Z-SCORE) 1k94A 3mzvA 4by6E 4by6F 1k94A 31.7 0.7 0 0 3mzvA 0 52.7 0 0 4by6E 0 0 20.4 8.8 4by6F 0 0 8.8 22