| 3MUZ | 4:748-1021; 4:748-1021; 4:748-1021; 4:748-1021 | E.COLI (LACZ) BETA-GALACTOSIDASE (R599A) IN COMPLEX WITH IPTG |
| 3MV1 | 4:748-1021; 4:748-1021; 4:748-1021; 4:748-1021 | E.COLI (LACZ) BETA-GALACTOSIDASE (R599A) IN COMPLEX WITH GUANIDINIUM |
| 1JYN | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE (E537Q) IN COMPLEX WITH LACTOSE |
| 1JYW | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE (E537Q) IN COMPLEX WITH PNPG |
| 1JYX | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE IN COMPLEX WITH IPTG |
| 1JZ2 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE-TRAPPED 2-F-GALACTOSYL-ENZYME INTERMEDIATE (ORTHORHOMBIC) |
| 1JZ3 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE-TRAPPED 2-DEOXY-GALACTOSYL ENZYME INTERMEDIATE |
| 1JZ5 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE IN COMPLEX WITH D-GALCTOPYRANOSYL-1-ON |
| 1JZ6 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE IN COMPLEX WITH GALACTO-TETRAZOLE |
| 1JZ7 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE IN COMPLEX WITH GALACTOSE |
| 1JZ8 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE (E537Q) IN COMPLEX WITH ALLOLACTOSE |
| 1PX3 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE (G794A) |
| 1PX4 | D:748-1021; D:748-1021; D:748-1021; D:748-1021 | E. COLI (LACZ) BETA-GALACTOSIDASE (G794A) WITH IPTG BOUND |