Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1o4vA 3go2A 5yuaA 1o4vA 100 60 58 3go2A 50 100 0 5yuaA 57 2 100 FOLD SIMILARITY (Z-SCORE) 1o4vA 3go2A 5yuaA 1o4vA 31.8 2.3 0 3go2A 0 72.9 0 5yuaA 0 0.9 27.9