title: Differential mobility of the N-terminal headpiece in the lac-repressor protein.
mesh_terms: D004926:Escherichia coli / Q000235:genetics; D009682:Magnetic Resonance Spectroscopy; D012097:Repressor Proteins; D014157:Transcription Factors
chemical_list: D012097:Repressor Proteins; D014157:Transcription Factors