Fig. (4). Summary of cell engineering achievements using the IWP and IWR classes of Porcn and Tnks inhibitors, respectively.
IWP-1, -2, and -4 inhibit Porcn whereas IWR-1 compound inhibits Tnks1 & 2. mES cells=mouse embryonic stem cells; hES cells=human embryonic stem cells; hiPS cells= human induced pluripotent stem cells.