6RYF:
reference: Mechanism for antigenic peptide selection by endoplasmic reticulum aminopeptidase 1., Giastas P, Mpakali A, Papakyriakou A, Lelis A, Kokkala P, Neu M, Rowland P, Liddle J, Georgiadis D, Stratikos E, Proc Natl Acad Sci U S A. 2019 Dec 16. pii: 1912070116. doi:, 10.1073/pnas.1912070116. PMID: 31843903

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