Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3uv0A 3uv0B 4q51A 3uv0A 100 98 0 3uv0B 98 100 53 4q51A 12 15 100 FOLD SIMILARITY (Z-SCORE) 3uv0A 3uv0B 4q51A 3uv0A 24.2 22.1 0 3uv0B 22.1 24.7 0.5 4q51A 1.3 1.2 48.1