priority journal Humans Transcription, Genetic transcription regulation article promoter region human human cell Transcription Factors fibronectin nonhuman protein expression transcription factor Fibronectins NF-kappa B RNA Polymerase II RNA polymerase II RNA transcription Transfection cell nucleus immunoglobulin enhancer binding protein messenger RNA phosphorylation protein binding transactivation Animals Binding, Competitive Carboxy-terminal domain Coupling Glucocorticoid receptor