1QR4:
reference: Purification, crystallization and preliminary crystallographic studies of a two fibronectin type-III domain segment from chicken tenascin encompassing the heparin- and contactin-binding regions., Bisig D, Weber P, Vaughan L, Winterhalter KH, Piontek K, Acta Crystallogr D Biol Crystallogr 1999 May;55(5):1069-73. PMID: 10216309

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