4NNP:
reference: Structural analysis of bacterial ABC transporter inhibition by an antibody fragment., Ahuja S, Rouge L, Swem DL, Sudhamsu J, Wu P, Russell SJ, Alexander MK, Tam C, Nishiyama M, Starovasnik MA, Koth CM, Structure. 2015 Apr 7;23(4):713-23. doi: 10.1016/j.str.2015.01.020. Epub 2015 Mar, 5. PMID: 25752540

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