FIG. 3.

Acquisition of deoxyribose-catabolizing genes by E. coli. The figure shows the growth pattern on deoxyribose (20 mM)-containing plates after 3 days at 37°C of E. coli K-12 strain MG1655 transformed with the plasmid pSU19 bearing various inserts: none (A), the rbsK gene amplified from serovar Typhimurium strain LT2 and encoding a putative RK (B), the deoK gene amplified from serovar Typhi and encoding dRK (C), or the deoKP locus amplified from serovar Typhi and encoding both dRK and a putative deoxyribose permease (D).