Nuclear matrix and chromosome scaffold preparations of in vitro cultured bovine liver cells have two proteins in common.

Nuclear matrices and chromosome scaffolds of in vitro cultured bovine liver cells were prepared under conditions that preserve the specific binding of the DNA. Protein compositions were analysed by electrophoresis and peptide mapping. Two slightly acidic polypeptides of apparent molecular masses 47 and 53 kDa were present in nuclear matrix as well as chromosome scaffold preparations. The corresponding matrix and scaffold proteins had identical peptide maps. Their putative function in the spatial organization of the DNA during the cell cycle is considered.