6VI2:
reference: Recognition of an alpha-helical hairpin in P22 large terminase by a synthetic antibody fragment., Lokareddy RK, Ko YH, Hong N, Doll SG, Paduch M, Niederweis M, Kossiakoff AA, Cingolani G, Acta Crystallogr D Struct Biol. 2020 Sep 1;76(Pt 9):876-888. doi:, 10.1107/S2059798320009912. Epub 2020 Aug 17. PMID: 32876063

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