Fig1B. Copyright: This image is from [doi:10.1073/pnas.0308600100] Haubensak W; Attardo A; Denk W; Huttner WB, Proc Natl Acad Sci U S A 2004 Mar 2;101(9):3196-201. [PMID:14963232] Copyright 2004 National Academy of Sciences, U.S.A.