3THK:
reference: High-Resolution Crystal Structure of Spectrin SH3 Domain Fused with a Proline-Rich Peptide., Gushchina LV, Gabdulkhakov AG, Nikonov SV, Filimonov VV, J Biomol Struct Dyn. 2011 Dec;29(3):485-95. PMID: 22066535

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