Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4g2kA 4g2kC 5u5bA 5u5bB 5u5bC 4g2kA 100 99 0 0 0 4g2kC 99 100 0 0 0 5u5bA 0 0 0 0 0 5u5bB 0 0 0 0 0 5u5bC 0 0 0 0 0 FOLD SIMILARITY (Z-SCORE) 4g2kA 4g2kC 5u5bA 5u5bB 5u5bC 4g2kA 12.8 11.1 0 0 0 4g2kC 11.1 12.5 0 0 0 5u5bA 0 0 0 0 0 5u5bB 0 0 0 0 0 5u5bC 0 0 0 0 0