Crystallization and preliminary X-ray diffraction analysis of human calcium-binding protein S100A12

S100A12, a member of the calgranulin family, isolated from human blood, has been crystallized by vapour diffusion in the presence of Ca2+. Crystals belong to the space group R3 with unit‐cell dimensions a = b = 99.6 c = 64.2 Å. There are two monomers per asymmetric unit, with a solvent content of 57.9%. The crystals diffract to at least 2.2 Å resolution and complete X‐ray data have been collected to 2.5 Å on a conventional laboratory source.