Skip to main content
. Author manuscript; available in PMC: 2020 May 15.
Published in final edited form as: J Am Chem Soc. 2019 May 6;141(19):7765–7775. doi: 10.1021/jacs.9b00196

Figure 2.

Figure 2.

Chemical structures of (left) histidine, (middle) δmHis (N(pros)-methyl-l-histidine), or 3-methyl-l-histidine, and (right) εmHis (N(tau)-methyl-l-histidine or 1-methyl-l-histidine).