This family of proteins inhibit Wnt signaling and act as chemorepulsive axon guidance molecules [1-2].

1: Draxin, a repulsive guidance protein for spinal cord and forebrain commissures. Islam SM, Shinmyo Y, Okafuji T, Su Y, Naser IB, Ahmed G, Zhang S, Chen S, Ohta K, Kiyonari H, Abe T, Tanaka S, Nishinakamura R, Terashima T, Kitamura T, Tanaka H; Science. 2009;323:388-393. PMID:19150847

2: Neucrin is a novel neural-specific secreted antagonist to canonical Wnt signaling. Miyake A, Takahashi Y, Miwa H, Shimada A, Konishi M, Itoh N; Biochem Biophys Res Commun. 2009;390:1051-1055. PMID:19857465