6MTI:
reference: Structural basis for the clamping and Ca(2+) activation of SNARE-mediated fusion by synaptotagmin., Grushin K, Wang J, Coleman J, Rothman JE, Sindelar CV, Krishnakumar SS, Nat Commun. 2019 Jun 3;10(1):2413. doi: 10.1038/s41467-019-10391-x. PMID: 31160571

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).