Fig. 1.

Low light, intermediate light, and high light LH2 types. (A) Spectra of cells grown under normal (approximately 20 Wm^-2) and low light (< 1 Wm^-2) conditions. Under normal conditions, the LH2 complexes give rise to peaks near 800 and 850 nm (Red Line), whereas under low light conditions the peaks are near 800 and 820 nm (Blue Line). A cell spectrum taken during adaptation in which both types of LH2 complex are found is shown in green. (B) Mass spectra of polypeptides present in LH2 isolated from normal (Red), low light (Blue), and intermediate (Green) conditions. The spectra have been offset vertically to aid the reader.