2RPN:
reference: Structural, functional and bioinformatic studies demonstrate the crucial role of an extended peptide binding site for the SH3 domain of yeast Abp1p., Stollar EJ, Garcia B, Chong PA, Rath A, Lin H, Forman-Kay JD, Davidson AR, J Biol Chem. 2009 Jul 9. PMID: 19590096

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