1AG4:
reference: Ca2+-loaded spherulin 3a from Physarum polycephalum adopts the prototype gamma-crystallin fold in aqueous solution., Rosinke B, Renner C, Mayr EM, Jaenicke R, Holak TA, J Mol Biol 1997 Aug 29;271(4):645-55. PMID: 9281431

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