Figure 2.

(A) Structure of trimeric main light-harvesting complex (LHC II) of plants at 2.5 Å resolution, PDB entry 2BHW [35]. Top view with regard to the thylakoid membrane plane, from the stromal side. (B) Monomeric subunit. The protein backbone consisting of three transmembrane α-helical domains is shown in grey. The monomeric subunit noncovalently binds 8 chlorophylls a and 6 chlorophylls b (shown in cyan and green, respectively) as well as two luteins (yellow), one neoxanthin (orange) and one violaxanthin (red). The binding site of the latter may also be occupied by its de-epoxidation products, antheraxanthin or zeaxanthin.