Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1p3qR 1p3qV 4i4kA 4i4kB 1p3qR 100 10 0 4 1p3qV 0 100 10 21 4i4kA 0 0 100 95 4i4kB 0 0 95 100 FOLD SIMILARITY (Z-SCORE) 1p3qR 1p3qV 4i4kA 4i4kB 1p3qR 6.2 0 0 0 1p3qV 0 19.2 0 0 4i4kA 0 0 28.7 25.9 4i4kB 0 0 25.9 29