Figure 1: The structural formulae of relevant indole and tryptophan derivatives.
From: Probing water micro-solvation in proteins by water catalysed proton-transfer tautomerism
(a) The chemical structures of (2,7-aza)Trp, 2,7-diazaindole, N(1)-Me and N(2)-Me. (b) The chemical structures of various indole and tryptophan analogues.
