FIGURE 4.

Three-dimensional representations of RC-LH1 membrane patches showing empty LH1 rings. A, empty LH1 rings (red arrows) within an RC-LH1 array; one core complex (white arrow) has lost its H-subunit probably as a result of the scanning by the AFM tip. B, a less well defined membrane patch where two prominent empty LH1 rings can be seen beside three core complexes, as well as some nanodissected cores, of which the best example is indicated by the white arrow. The data have been treated with a low pass filter to reduce noise.