4GZ8:
reference: Neuropilins lock secreted semaphorins onto plexins in a ternary signaling complex., Janssen BJ, Malinauskas T, Weir GA, Cader MZ, Siebold C, Jones EY, Nat Struct Mol Biol. 2012 Dec;19(12):1293-9. doi: 10.1038/nsmb.2416. Epub 2012, Oct 28. PMID: 23104057

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