Amino Acid Sequence, Animals, Binding Sites, Blotting, Western, Cell Nucleus, Core Binding Factor Alpha 1 Subunit, DNA-Binding Proteins, Fungal Proteins, Genes, Reporter, HeLa Cells, Humans, In Situ Hybridization, Luciferases, Microscopy, Fluorescence, Molecular Sequence Data, Mutation, Neoplasm Proteins, Osteocalcin, Plasmids, Protein Structure, Tertiary, Rats, Saccharomyces cerevisiae Proteins, Sequence Homology, Amino Acid, Signal Transduction, Transcription Factors, Transcription, Genetic, Transcriptional Activation, Tumor Cells, Cultured