Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2frhA 4makA 5a2dA 2frhA 100 3 44 4makA 3 100 0 5a2dA 0 6 100 FOLD SIMILARITY (Z-SCORE) 2frhA 4makA 5a2dA 2frhA 24.2 0 0 4makA 0.1 18.5 0 5a2dA 0 0 72.7