2MX9:
reference: Diversified Structural Basis of a Conserved Molecular Mechanism for pH-Dependent Dimerization in Spider Silk N-Terminal Domains., Otikovs M, Chen G, Nordling K, Landreh M, Meng Q, Jornvall H, Kronqvist N, Rising A, Johansson J, Jaudzems K, Chembiochem. 2015 Aug 17;16(12):1720-4. doi: 10.1002/cbic.201500263. Epub 2015, Jul 1. PMID: 26033527

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