title: Crystal density measurements using aqueous ficoll solutions.
mesh_terms: D002499:Centrifugation, Density Gradient / Q000379:methods; D003460:Crystallization; D005362:Ficoll; D008970:Molecular Weight; D011487:Protein Conformation; D011506:Proteins / Q000032:analysis*; D012996:Solutions
chemical_list: D011506:Proteins; D012996:Solutions; D005362:Ficoll