Crystallization and preliminary X-ray investigation of recombinant simian immunodeficiency virus matrix protein.

Simian immunodeficiency virus matrix protein has been crystallized from Tris-HCl buffer with polyethylene glycol and isopropanol as precipitants. The crystals belong to space group C2 with unit cell dimensions a = 69.9 A, b = 115.2 A, c = 32.5 A, beta = 108.1 degrees and diffract X rays to a minimum Bragg spacing of 2 A. These crystals appear suitable for a high resolution structure analysis.