Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3d1lA 3h76A 4lrtA 3d1lA 100 34 55 3h76A 32 100 81 4lrtA 23 79 100 FOLD SIMILARITY (Z-SCORE) 3d1lA 3h76A 4lrtA 3d1lA 37.3 0 0.2 3h76A 0 61.8 0 4lrtA 0.3 0 67.3