MICROBIOLOGY. For the article “Biotin uptake in prokaryotes by solute transporters with an optional ATP-binding cassette-containing module,” by Peter Hebbeln, Dmitry A. Rodionov, Anja Alfandega, and Thomas Eitinger, which appeared in issue 8, February 20, 2007, of Proc Natl Acad Sci USA (104:2909–2914; first published February 14, 2007; 10.1073/pnas.0609905104), Fig. 4 appeared incorrectly, due to a printer's error. The online version has been corrected. The corrected figure and its legend appear below.
Fig. 4.
Biotin-transport rates of recombinant E. coli. Initial velocities were calculated at biotin concentrations in the picomolar (Left) and nanomolar (Right) ranges. Transport rates of cells producing R. capsulatus BioMNY (black bars) were compared with those containing BioY (white bars in A), BioMK42NNY (hatched bars in B), BioMY (horizontally hatched bars in C), and BioNY (gray bars in C). The values represent the means of at least two independent assays.