FIG 9.

Ag⁺ and Cu⁺ specifically target the B800 within the LH2. Structure of the LH2 and arrangement of pigments within the complex from Rhodopseudomonas acidophila (1KZU.pdb) (25). The figure was generated using the Protein Data Bank (Swiss-PdbViewer). View parallel to the plane of the membrane (A) and from the top of the complex (B) showing the exposed B800 molecules (in red) located between the β subunit helices, which form the outer ring (cyan). The B850 molecules (green) are buried between the concentric rings formed by the helices of the α subunits (pink) and the outer β subunit helix ring. For better viewing, carotenoids and helices of α and β subunits were hidden.