Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1fxkB 1fxkC 4lrtA 1fxkB 100 47 0 1fxkC 48 100 56 4lrtA 0 0 100 FOLD SIMILARITY (Z-SCORE) 1fxkB 1fxkC 4lrtA 1fxkB 16.4 11 0 1fxkC 7.4 18 0 4lrtA 0 0 67.3