Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1x0uA 2ov9A 3trbA 3trbB 1x0uA 100 70 0 0 2ov9A 70 100 0 0 3trbA 37 0 100 99 3trbB 33 0 99 100 FOLD SIMILARITY (Z-SCORE) 1x0uA 2ov9A 3trbA 3trbB 1x0uA 61.3 0 0 0 2ov9A 0 35.5 0 0 3trbA 0 0 19.1 17.2 3trbB 0 0 17.2 18.8