1LKL:
reference: Crystal structures of the human p56lck SH2 domain in complex with two short phosphotyrosyl peptides at 1.0 A and 1.8 A resolution., Tong L, Warren TC, King J, Betageri R, Rose J, Jakes S, J Mol Biol 1996 Mar 1;256(3):601-10. PMID: 8604142

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