Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2bumA 2bumB 3twiA 2bumA 100 71 51 2bumB 72 100 52 3twiA 58 54 100 FOLD SIMILARITY (Z-SCORE) 2bumA 2bumB 3twiA 2bumA 36.8 18.8 0 2bumB 18.8 38.8 0.5 3twiA 0.4 0.5 30.3