1TV4:
reference: Reactivity and chemical synthesis of L-pyrrolysine- the 22(nd) genetically encoded amino acid., Hao B, Zhao G, Kang PT, Soares JA, Ferguson TK, Gallucci J, Krzycki JA, Chan MK, Chem Biol 2004 Sep;11(9):1317-24. PMID: 15380192

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