Abstract
The B800–820 light-harvesting complex, an integral membrane protein, from Rhodopseudomonas acidophila strain 7750 has been crystallized. The tabular plates have a hexagonal unit cell of a = b = 121·8 A ̊ and c = 283·1 A ̊ and belong to the space group R32. X-ray diffraction data have been collected to 6 Å resolution, using an area detector on a rotating anode source. The B800–820 light-harvesting complex is comprised of four low molecular weight apoproteins (B800−820 α 1, B800−820 α 2, B800−820 β 1 and B800−820 β 2). Polyacrylamide gel electrophoresis shows that the complex exists as an oligomeric assembly, with an apparent molecular weight of 92,000.
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