title: Purification of Xenopus laevis embryo and liver nuclei using metrizamide.
mesh_terms: D000818:Animals; D002458:Cell Fractionation / Q000379:methods*; D002467:Cell Nucleus; D002500:Centrifugation, Isopycnic / Q000379:methods; D004625:Embryo, Nonmammalian / Q000648:ultrastructure; D008099:Liver / Q000648:ultrastructure; D008793:Metrizamide; D014981:Xenopus
chemical_list: D008793:Metrizamide