Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3k1yA 3k1yC 4ltnA 4ptzC 5lefC 5lefD 3k1yA 100 99 67 64 0 0 3k1yC 99 100 68 64 0 0 4ltnA 67 68 100 69 0 0 4ptzC 64 64 69 100 0 0 5lefC 4 5 12 0 100 6 5lefD 0 0 0 0 6 100 FOLD SIMILARITY (Z-SCORE) 3k1yA 3k1yC 4ltnA 4ptzC 5lefC 5lefD 3k1yA 37.7 35.3 23.8 22.4 0 0 3k1yC 35.3 37.7 23.8 22.4 0 0 4ltnA 23.8 23.8 38.9 26 0 0 4ptzC 22.4 22.4 26 37.2 0 0 5lefC 0 0 0 0 6.8 5.6 5lefD 0 0 0 0 5.6 6.7