Figure 19-8a


Figure 19-8b

Click on structure and drag to rotate. Click on figure to reset.

A ribbon diagram of the photosynthetic reaction center from Rhodobacter sphaeroides. The H, M, and L subunits of this protein, as viewed from within the plane of the plasma membrane (cytoplasm below) are magenta, cyan, and orange, respectively. The prosthetic groups are drawn in stick form with C green, N blue, O red, and Mg light green. The Fe(II) ion is represented by a yellow sphere. The 11 largely vertical helices that form the central portion of the protein constitute its transmembrane region. Click on the "Hide" button to see only the prosthetic groups. [X-ray structure by Marianne Schiffer, Argonne National Laboratory. PDBid 2RCR.]