Collision cross sections of peptide charge states.^a

Peptide	mol. wt. (Da)	z^b	W (Å^2)	ref.
Val^5-angiotensin II	1032.1	1	234	^c
bradykinin	1060.2	1	245	^d
		1	242	^e
		2	246
Ac-AKAAAAKAGAAKAAAA-NH2	1340.0	2	314	^f
		3	332
substance P	1348.6	1	292	^c
TRQARRNAAAAWRERQR	2096.0	1	363	^c
		2	373
		3	387
		4	462
insulin chain A	2532.0	1	390	^d
		-1	390
		-2	388
		-3	390

^aPeptides arranged in order of increasing molecular weight.

^bCharge state.

^cValentine, S. J., unpublished data.

^dWyttenbach, T.; von Helden, G.; Bowers, M. T. J. Am. Chem. Soc. 1996, 118, 8355.

^eCounterman, A. E.; Valentine, S. J.; Srebalus, C. A.; Henderson, S. C.; Hoaglund, C. S.; Clemmer, D. E. J. Am. Soc. Mass Spectrom. 1998, 9, 743.

Counterman, A. E., unpublished data.