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. Author manuscript; available in PMC: 2012 May 10.
Published in final edited form as: J Am Chem Soc. 2011 Apr 14;133(18):7152–7158. doi: 10.1021/ja2009554

Table 1.

Hydrodynamic radii (Å) of aS, nit-Y39F and Y125/133/136D at 25°C with and without 8M urea determined by PFG-NMR (Fits to the raw data in Figure S6).

Tris buffer + 8M urea
aS 27.4±0.4 34.7±0.3
nit-Y39F 29.0±0.3 32.9±0.6
Y125/133/136D 27.8±0.2 32.6±0.1