Crystals of an integral membrane protein diffracting to 1.8 A resolution

A new crystal form of porin from Rhodobacter capsulatus has been obtained. The crystals are rhombohedral, space group R3, with hexagonal axes a = b = 92.3 A, c = 146.2 A. They contain one monomer in the asymmetric unit and diffract to a resolution of at least 1.8 A.