yel:LC20_07525 K09912 uncharacterized protein | (GenBank) DUF2058 domain-containing protein yel:LC20_02122 K27069 LacI family transcriptional regulator, lactose operon repressor | (GenBank) lacI; lac repressor yel:LC20_02120 K01190 beta-galactosidase [EC:3.2.1.23] | (GenBank) lacZ; beta-galactosidase yel:LC20_03214 K02532 MFS transporter, OHS family, lactose permease | (GenBank) MFS transporter