Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2dqbA 2dqbD 3onrA 3onrC 2dqbA 100 99 0 0 2dqbD 99 100 0 0 3onrA 5 0 100 99 3onrC 0 0 99 100 FOLD SIMILARITY (Z-SCORE) 2dqbA 2dqbD 3onrA 3onrC 2dqbA 60.7 55.4 0 0 2dqbD 55.4 60.1 0 0 3onrA 0 0 15 13.3 3onrC 0 0 13.3 15.1