4OVO:
reference: Refined X-ray crystal structures of the reactive site modified ovomucoid inhibitor third domains from silver pheasant (OMSVP3*) and from Japanese quail (OMJPQ3*)., Musil D, Bode W, Huber R, Laskowski M Jr, Lin TY, Ardelt W, J Mol Biol 1991 Aug 5;220(3):739-55. PMID: 1870129

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