Figure 3.

Structure of the monomeric minor light-harvesting complex CP29 of plants at 2.80 Å resolution, PDB entry 3PL9 [36]. Side view with regard to the thylakoid membrane plane. The protein backbone consisting of three transmembrane α-helical domains is shown in grey. CP29 binds 8 chlorophylls a and 4 chlorophylls b (shown in cyan and green, respectively) and has one possible mixed Chl-binding site. Three xanthophylls are bound, one lutein (yellow), one neoxanthin (orange) and one violaxanthin (red). The binding site of the latter may possibly also be occupied by its de-epoxidation products, antheraxanthin or zeaxanthin.