1XT3:
reference: Structural Basis of Citrate-dependent and Heparan Sulfate-mediated Cell Surface Retention of Cobra Cardiotoxin A3., Lee SC, Guan HH, Wang CH, Huang WN, Tjong SC, Chen CJ, Wu WG, J Biol Chem 2005 Mar 11;280(10):9567-77. Epub 2004 Dec 6. PMID: 15590643

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