Application of electrospray mass spectrometry in probing protein-protein and protein-ligand noncovalent interactions - Huang, Eric C; Pramanik, Birendra N; Tsarbopoulos, Anthony; Reichert, Paul; Ganguly, Ashit K; Trotta, Paul P; Nagabhushan, Tattanahalli L; Covey, Thomas R (Journal of the American Society for Mass Spectrometry, 1993)