Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2dbsA 2dbsB 4kmrA 4kmrB 2dbsA 100 96 20 16 2dbsB 96 100 11 11 4kmrA 16 10 100 99 4kmrB 19 11 99 100 FOLD SIMILARITY (Z-SCORE) 2dbsA 2dbsB 4kmrA 4kmrB 2dbsA 18.6 15.6 0.2 0.3 2dbsB 15.6 19.5 0.2 0.3 4kmrA 0 0.3 47.9 41.1 4kmrB 0.3 0.3 41.1 47.8