Figure 2D. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/j.modgep.2004.12.002] Gene Expr Patterns 5: 517-23, Hirai S; Kawaguchi A; Suenaga J; Ono M; Cui de F; Ohno S, Expression of MUK/DLK/ZPK, an activator of the JNK pathway, in the nervous systems of the developing mouse embryo. Copyright 2005.