根拠: SAXS, Experimental curve closely matches theoretical curve, and the radius of gyration matches theoretical., mass spectrometry, Native MS confirms the presence of the heterodimer in solution. ...根拠: SAXS, Experimental curve closely matches theoretical curve, and the radius of gyration matches theoretical., mass spectrometry, Native MS confirms the presence of the heterodimer in solution., gel filtration, Protein elutes as a monodisperse peak at the expected heterodimer volume.