Collision cross sections (in Å2) of singly-protonated polyaminoacids.a



nb Glync Alan Valn Thrn Ilen Leun Glnn Lysn Hisn Phen Trpn
2 62 86.5 98.2 100.0 99.2 98.7 122.3
3 76 89.0 116.3 128.0 125.9 133.4 128.5 137.8 155.8
4 86 102.9 136.1 155.4 157.8 147.8 157.8 154.2 168.6 192.3
5 97 115.0 155.0 174.5 181.3 169.0 180.5 179.8 200.0 214.6
6 107 127.0 176.2 199.6 204.5 190.4 209.9 197.2 224.8 249.3
7 140.5 188.8 208.3 231.3 213.8 247.1 268.3
8 155.5 202.8 257.5 225.4 253.6 234.6 296.1
9 167.9 216.1 273.2 271.1 317.7
10 176.3 233.8
11 192.2 246.8
12 202.4 263.5
13 214.9 280.0
14 224.9 291.5
15 235.2
16 247.4
17 256.2
18 265.0
19 276.3


a Unless otherwise noted, values listed here were recorded by Henderson et al. using an ion trap/ion mobility/time-of-flight instrument (Henderson, S. C.; Li, J.; Counterman, A. E.; Clemmer, D. E., J. Phys. Chem. B 1999, 103, 8780.)
b Number of residues in the polyaminoacid.
c Reported by Wyttenbach, T.; Bushnell, J. E.; Bowers, M. T. J. Am. Chem. Soc. 1998, 120, 5098.