FIG. 5.

(A) l-[U- ¹⁴C]arginine uptake in germlings of the wild type (rhbA), the ΔrhbA strain (ΔrhbA), and the complemented strain (ΔrhbA + rhbA) after incubation for 1 h in fresh minimal medium with 10 mM ammonium tartrate as the nitrogen source. (B) l-[U-¹⁴C]arginine uptake in germlings of the wild type, the ΔrhbA strain, and the complemented strain after incubation for 1 h in fresh minimal medium with 10 mM proline as the nitrogen source. Each graph is representative of several experiments.