Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2o6yA 4ltbA 4ltbB 4q16A 2o6yA 100 67 67 58 4ltbA 0 0 0 0 4ltbB 0 0 0 0 4q16A 56 0 0 100 FOLD SIMILARITY (Z-SCORE) 2o6yA 4ltbA 4ltbB 4q16A 2o6yA 62.2 1.6 1.6 0 4ltbA 0 0 0 0 4ltbB 0 0 0 0 4q16A 0 0 0 46.7