1T3C:
reference: Structural analysis of botulinum neurotoxin type E catalytic domain and its mutant Glu212-->Gln reveals the pivotal role of the Glu212 carboxylate in the catalytic pathway., Agarwal R, Eswaramoorthy S, Kumaran D, Binz T, Swaminathan S, Biochemistry 2004 Jun 1;43(21):6637-44. PMID: 15157097

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