6VK2:
reference: The dynamics of free and phosphopeptide-bound Grb2-SH2 reveals two dynamically independent subdomains and an encounter complex with fuzzy interactions., Sanches K, Caruso IP, Almeida FCL, Melo FA, Sci Rep. 2020 Aug 3;10(1):13040. doi: 10.1038/s41598-020-70034-w. PMID: 32747626

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