4JIF:
reference: Cocrystal structure of the ICAP1 PTB domain in complex with a KRIT1 peptide., Liu W, Boggon TJ, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013 May;69(Pt 5):494-8. doi:, 10.1107/S1744309113010762. Epub 2013 Apr 27. PMID: 23695561

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