(2S)-2-amino-6-{[(prop-2-yn-1-yloxy)carbonyl]amino}hexanoic acid

N-ε-propargyloxycarbonyl-L-lysine (H-L-Lys(Poc)-OH) is a lysine-based unnatural amino acid (UAA). N-ε-propargyloxycarbonyl-L-lysine is widely used for bio-conjugation of fluorescent probes in diverse organisms from E. coli to mammalian cells even in animals[1][2]. Labeling of N-ε-propargyloxycarbonyl-L-lysine (H-L-Lys(Poc)-OH)-carrying cellular proteins, such as Sec61β, Htt74Q and the histone H3 variant H3.3, with a sensitive Raman tag by click chemistry for molecular hyperspectral SRS imaging[1].

[1]. Kyung Jin Lee, et al. Site-Specific Labeling of Proteins Using Unnatural Amino Acids. Mol Cells. 2019 May 31;42(5):386-396. [2]. Enke HEIKE, et al. Modified microcystins and nodularins.WO2018206715A2