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. Author manuscript; available in PMC: 2014 Feb 11.
Published in final edited form as: ACS Comb Sci. 2013 Jan 7;15(2):120–129. doi: 10.1021/co300136j

Figure 4.

Figure 4

Bidentate hydrogen bonding interactions between Boc-protected Lys side chains (a), Pbf-protected Arg side chains (b), Lys(Boc) side chain and Glu α-carboxyl group (c), and Glu α-carboxyl group and 2-piperidone (d).