4npj is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
↑ Min SW, Chang WP, Sudhof TC. E-Syts, a family of membranous Ca2+-sensor proteins with multiple C2 domains. Proc Natl Acad Sci U S A. 2007 Mar 6;104(10):3823-8. Epub 2007 Feb 28. PMID:17360437 doi:http://dx.doi.org/0611725104