Title: Zagotta WN, et al. Measuring distances between TRPV1 and the plasma membrane using a noncanonical amino acid and transition metal ion FRET. J Gen Physiol. 2016 Feb;147(2):201-16.
Title: Xiang Z, et al. Enantiospecific synthesis of genetically encodable fluorescent unnatural amino acid L-3-(6-acetylnaphthalen-2-ylamino)-2-aminopropanoic acid. J Org Chem. 2011 Aug 5;76(15):6367-71.