crystallization communications
The Escherichia coli cyclic AMP receptor protein (CRP) crystals were obtained and diffracted at a 2.9 Å resolution, which belonged to the space group P3121, with unit-cell parameters a = b = 76.03, c = 144.00 Å. The asymmetric unit was found to contain one protein molecule and a half 38 bp full-length double-stranded DNA fragment with a Matthews coefficient of 2.62 Å3 Da-1 and a solvent content of 53.14%.