Figure 4.

Analogue pigments of PR-D212N,F234S. [a] Normalized absorbance spectra of purified pigments in DDM containing A1 (black), A2 (pink), MOA2 (green), or MMAR (blue). [b–d] Proton pumping activities of the pigments (same colors as in [a]) in starved E. coli UT5600 cells upon illumination with [b] white light, [c] a 660 nm LED, and [d] a 730 nm LED. Controls are the same as in Figure 3.