Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 5appA 5appB 6fiaA 6fiaB 6fiaC 5appA 100 88 50 44 25 5appB 2 100 61 52 22 6fiaA 38 38 100 97 35 6fiaB 41 40 97 100 35 6fiaC 26 27 35 35 100 FOLD SIMILARITY (Z-SCORE) 5appA 5appB 6fiaA 6fiaB 6fiaC 5appA 8.9 4 2.2 2.2 2.3 5appB 0.6 8.9 3.1 3.3 2.2 6fiaA 5.9 5.8 8.6 7.9 6.5 6fiaB 5.6 5.6 7.9 8.5 6.6 6fiaC 4.8 4.8 6.5 6.6 8.3