Figure 3C. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/j.mod.2004.08.003] Ishikawa A; Kitajima S; Takahashi Y; Kokubo H; Kanno J; Inoue T; Saga Y, "Mouse Nkd1, a Wnt antagonist, exhibits oscillatory gene expression in the PSM under the control of Notch signaling." Mech Dev 2004 Dec;121(12):1443-5 Copyright 2004. [PMID:15511637]