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. Author manuscript; available in PMC: 2014 Sep 24.
Published in final edited form as: ACS Nano. 2013 Sep 5;7(9):7562–7572. doi: 10.1021/nn401562f

Figure 2.

Figure 2

a) 2D-fpRFDR 13C NMR spectrum of Sample A with chemical shift assignment paths for each of the labeled amino acids. b) CPMAS NMR spectra of Sample A (purple) and Sample B (blue). Vertical dotted lines are drawn to guide comparison of peak positions.