1AWE:
reference: The solution structure of the pleckstrin homology domain of human SOS1. A possible structural role for the sequential association of diffuse B cell lymphoma and pleckstrin homology domains., Zheng J, Chen RH, Corblan-Garcia S, Cahill SM, Bar-Sagi D, Cowburn D, J Biol Chem 1997 Nov 28;272(48):30340-4. PMID: 9374522

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