5IZ2:
reference: Crystal Structure of the Nephila clavipes Major Ampullate Spidroin 1A N-terminal Domain Reveals Plasticity at the Dimer Interface., Atkison JH, Parnham S, Marcotte WR Jr, Olsen SK, J Biol Chem. 2016 Jul 21. pii: jbc.M116.736710. PMID: 27445329

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