Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1s7mA 1s7mB 3fc0A 3fc0B 1s7mA 100 99 5 19 1s7mB 99 100 7 0 3fc0A 8 0 100 97 3fc0B 19 0 97 100 FOLD SIMILARITY (Z-SCORE) 1s7mA 1s7mB 3fc0A 3fc0B 1s7mA 19.8 18 0 0 1s7mB 18 19.7 0 0 3fc0A 0 0 25.8 23.5 3fc0B 0 0 23.5 25.5