Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3hsrA 3hsrB 4rt5A 4rt5B 5nxfA 3hsrA 100 98 20 15 12 3hsrB 98 100 3 6 15 4rt5A 20 9 100 99 0 4rt5B 21 6 99 100 0 5nxfA 13 14 4 4 100 FOLD SIMILARITY (Z-SCORE) 3hsrA 3hsrB 4rt5A 4rt5B 5nxfA 3hsrA 24.1 20.4 0 0 0 3hsrB 20.4 23.8 0 0 0 4rt5A 0 0 21.7 20.2 0.9 4rt5B 0 0 20.2 21.8 0 5nxfA 0 0 0 0 30.9