Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1g0sA 1g0sB 3ztaA 1g0sA 100 96 0 1g0sB 96 100 0 3ztaA 0 3 100 FOLD SIMILARITY (Z-SCORE) 1g0sA 1g0sB 3ztaA 1g0sA 32.4 29 0 1g0sB 29 33.5 0 3ztaA 0 0 27