| 1LBH | A:162-290,A:321-337; A:62-161,A:291-320; B:62-161,B:291-320; C:62-161,C:291-320; D:62-161,D:291-320; B:162-290,B:321-337; C:162-290,C:321-337; D:162-290,D:321-337 | INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG |
| 1LBI | B:162-290,B:321-336; C:162-290,C:321-336; C:62-161,C:291-320; D:62-161,D:291-320; D:162-290,D:321-336; A:162-290,A:321-337; A:62-161,A:291-320; B:62-161,B:291-320 | LAC REPRESSOR |