4Q4H:
reference: Structural basis for allosteric cross-talk between the asymmetric nucleotide binding sites of a heterodimeric ABC exporter., Hohl M, Hurlimann LM, Bohm S, Schoppe J, Grutter MG, Bordignon E, Seeger MA, Proc Natl Acad Sci U S A. 2014 Jul 29;111(30):11025-30. doi:, 10.1073/pnas.1400485111. Epub 2014 Jul 16. PMID: 25030449

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