Figure 7.

Interactions between neighbouring LHC-II trimers. (A) In the membrane similar to type-I crystals from pea LHC-II, neighbouring trimers are symmetrically related within each crystalline layer on a up and down manner. (B) Model for the in vivo interaction within the thylakoid membranes. The same arrangement as in the type-I crystals was used, and one of the trimers was flipped by 180° so that both trimers are pointing in the same direction as in thylakoid membranes. Additionally, we restrained the model so that the distances between atoms that are in close contact is identical in (A, B). This is necessary to avoid clashes between trimers. The centre-to-centre distance between the closest Chls in neighbouring trimers are shown. Grey, polypeptide; cyan, Chl a; green, Chl b; dark orange, lutein; light orange, neoxanthin; yellow, violaxanthin; pink, lipids.