Seems to antagonize the function of BMP4 by binding to it and preventing its interaction with receptors. Alters the fate commitment of neural stem cells from gliogenesis to neurogenesis. Contributes to neuronal differentiation of neural stem cells in the brain by preventing the adoption of a glial fate. May play a crucial role in dorsoventral axis formation. May play a role in embryonic bone formation. Plays a role during anterior segment eye development (By similarity). Ubiquitously expressed in neurogenic regions of the embryonic brain. The sequence shown has an N-terminus according to mammalian orthologs. The original sequence from PubMed:14684875 gives a longer N-terminus and suggests a signal sequence of 97 AA.