@article {17156,
	title = {Structural analysis of biologically active peptides and recombinant proteins and their modified counterparts by mass spectrometry},
	journal = {Journal of Chromatography B: Biomedical Sciences and Applications},
	volume = {562},
	year = {1991},
	pages = {377-389},
	publisher = {Elsevier},
	isbn = {0378-4347},
	author = {Pramanik, BN and Tsarbopoulos, A and Labdon, JE and Trotta, PP and Nagabhushan, TL}
}
