eso:O3O_05535 K02532 MFS transporter, OHS family, lactose permease | (GenBank) lacY; galactoside permease eso:O3O_05540 K01190 beta-galactosidase [EC:3.2.1.23] | (GenBank) lacZ; beta-D-galactosidase eso:O3O_05545 K27069 LacI family transcriptional regulator, lactose operon repressor | (GenBank) lacI; lac repressor