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. Author manuscript; available in PMC: 2015 Apr 7.
Published in final edited form as: Angew Chem Int Ed Engl. 2014 Mar 11;53(15):3932–3936. doi: 10.1002/anie.201400001

Figure 1.

Figure 1

A) The trans forms of the photoswitchable click amino acids. PSCaa 1: 2-amino-3-(4-((3-vinylphenyl)diazenyl)phenyl)propanoic acid; Keto-PSCaa 2: 2-amino-3-(4-((3-(2-acetyl)phenyl)diazenyl)phenyl)propanoic acid; Cl-PSCaa 3: 2-amino-3-(4-((3-(chloromethyl)phenyl)diazenyl)phenyl)propanoic acid. B) X-ray crystal structure of the active site cavity of the MmOmePylRS (PDB 3QTC), in which the structure of PSCaa 1 (cyan) was superimposed. Residues mutated in the synthetase library are shown in yellow stick.