5HB1:
reference: Architecture of the symmetric core of the nuclear pore., Lin DH, Stuwe T, Schilbach S, Rundlet EJ, Perriches T, Mobbs G, Fan Y, Thierbach K, Huber FM, Collins LN, Davenport AM, Jeon YE, Hoelz A, Science. 2016 Apr 15;352(6283):aaf1015. doi: 10.1126/science.aaf1015. Epub 2016, Apr 14. PMID: 27081075

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