Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4fzsA 4fzsB 5fshA 5fshB 4fzsA 100 81 100 47 4fzsB 99 100 0 0 5fshA 35 56 100 98 5fshB 0 56 98 100 FOLD SIMILARITY (Z-SCORE) 4fzsA 4fzsB 5fshA 5fshB 4fzsA 23.6 9.6 2.8 2.1 4fzsB 17 20.8 0 0 5fshA 0.9 2.5 49.5 44.1 5fshB 0 2.5 44.1 50.1