National Center for Biotechnology Information NCBI NLM MEDLINE Mice Molecular animals pubmed abstract nih national institutes of health national library of medicine research support u.s. gov't P.H.S. Adipocytes / metabolism genetic* 3T3 Cells CCAAT-Enhancer-Binding Proteins DNA-Binding Proteins / metabolism* Nuclear Proteins / metabolism* Receptors Promoter Regions Recombinant Fusion Proteins / biosynthesis transcription cytoplasmic and nuclear / genetics* transcription factors / genetics* transcription factors / metabolism cloning transfection dna-binding proteins / genetics nuclear proteins / genetics pmid:10862621 doi:10.1074/jbc.m003593200 g elberg j m gimble s y tsai binding sites mutagenesis protein isoforms / genetics protein isoforms / metabolism recombinant fusion proteins / metabolism sequence deletion