title: Platelet factor 4. Crystallization and x-ray diffraction studies.
abstract: Human platelet factor 4 was crystallized with ammonium sulfate. The crystals were orthorhombic, space group P21212, with unit cell dimensions a = 78.7 A, b = 80.6 A, and c = 54.6 A. Unit cell volume and mass of the protein (7800 daltons) indicated four or five molecules in each asymmetric unit cell.
mesh_terms: D002118:Calcium / Q000302:isolation & purification; D003460:Crystallization; D006801:Humans; D011487:Protein Conformation; D014961:X-Ray Diffraction
chemical_list: D002118:Calcium