Fig. 1: (from Krauss et al., Nature Struct. Biology, 3, 965)
Overall view of the photosynthetic system I molecule - Courtesy of N. Krauss, Institut für Kristallographie Berlin, Germany) a-helices are represented as tubes and labelled a-y. Transmenbrane and surface
-helices
of the peripheral subunits are purple, those involved in trimerisation
red, those of the extrinsic stromal subunits are green. The porphyrin headgroups
of chlorophyll a are indicated as wire models, atoms of iron-sulphur clusters
as red spheres.
