Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3a1mA 3a1mC 4jivA 3a1mA 100 99 91 3a1mC 99 100 89 4jivA 89 26 100 FOLD SIMILARITY (Z-SCORE) 3a1mA 3a1mC 4jivA 3a1mA 12.1 11.5 8.5 3a1mC 11.5 12 8.4 4jivA 7.8 6 11.8