Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4l5jA 4x5sA 4l5jA 100 0 4x5sA 58 100 FOLD SIMILARITY (Z-SCORE) 4l5jA 4x5sA 4l5jA 49.1 0 4x5sA 0 43.2