5XHF:
reference: Extensive Survey of Antibody Invariant Positions for Efficient Chemical Conjugation Using Expanded Genetic Codes., Kato A, Kuratani M, Yanagisawa T, Ohtake K, Hayashi A, Amano Y, Kimura K, Yokoyama S, Sakamoto K, Shiraishi Y, Bioconjug Chem. 2017 Aug 16;28(8):2099-2108. doi:, 10.1021/acs.bioconjchem.7b00265. Epub 2017 Jul 20. PMID: 28727448

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