Arginine/metabolism; DNA-Binding Proteins/metabolism; Histones/metabolism; Phosphoproteins; Promoter Regions, Genetic/genetics; Protein-Arginine N-Methyltransferases/metabolism; Transcription Factors/metabolism; Amino Acid Sequence; Animals; Binding Sites; Blotting, Western; Chromatin/genetics; DNA Primers/chemistry; DNA-Binding Proteins/genetics; Electrophoretic Mobility Shift Assay; Erythroid-Specific DNA-Binding Factors; Gene Expression Regulation; Glutathione Transferase/chemistry; Glutathione Transferase/metabolism; Luciferases/metabolism; Methylation; Molecular Sequence Data; Nuclear Factor 90 Proteins; Protein-Arginine N-Methyltransferases/genetics; RNA-Binding Proteins/metabolism; Regulatory Sequences, Nucleic Acid; Repressor Proteins; Sequence Deletion; Sequence Homology, Amino Acid; Transcription Factors/genetics; Transcription, Genetic; Transcriptional Activation; Transfection; YY1 Transcription Factor; Zinc Fingers