Fig. 2: Synthesis and characterization of δVin-H.
From: Genetically encoded Nδ-vinyl histidine for the evolution of enzyme catalytic center

A The synthetic route of δVin-H. B The structural C-H interaction in the HMBC analysis of δVin-His and εVin-His. C 2D NMR(HMBC) analysis of δVin-H to confirm the substitutional position of the vinyl group on His. Source data are provided as a Source Data file.