Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3rvyA 6c6kA 6c6kC 3rvyA 100 46 0 6c6kA 49 100 0 6c6kC 0 0 100 FOLD SIMILARITY (Z-SCORE) 3rvyA 6c6kA 6c6kC 3rvyA 27.7 3.6 0 6c6kA 0.2 63.2 0 6c6kC 0 0 10.3