6SYC:
reference: Lysozyme crystals dyed with bromophenol blue: where has the dye gone?, Plaza-Garrido M, Salinas-Garcia MC, Alba-Elena D, Martinez JC, Camara-Artigas A, Acta Crystallogr D Struct Biol. 2020 Sep 1;76(Pt 9):845-856. doi:, 10.1107/S2059798320008803. Epub 2020 Sep 1. PMID: 32876060

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