3L81:
reference: Sorting of the Alzheimer's disease amyloid precursor protein mediated by the AP-4 complex., Burgos PV, Mardones GA, Rojas AL, daSilva LL, Prabhu Y, Hurley JH, Bonifacino JS, Dev Cell. 2010 Mar 16;18(3):425-36. PMID: 20230749

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