Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2arpA 2arpF 3b4vA 3b4vD 2arpA 100 0 98 10 2arpF 33 100 38 54 3b4vA 93 0 100 15 3b4vD 9 54 0 100 FOLD SIMILARITY (Z-SCORE) 2arpA 2arpF 3b4vA 3b4vD 2arpA 17.9 0 12.6 0 2arpF 0 22 0 17.9 3b4vA 12.6 0 18.9 0 3b4vD 0 17.9 0 26.1