Probable hormone (By similarity). Required for the proper formation of the central nervous system by attenuating cell proliferation during development (PubMed:21349154). Morpholino knockdown causes severe defects in the development of the central nervous system, including enlarged hindbrain ventricles resembling a brain ventricular hydrocephalus-like edema phenotype (PubMed:21349154). Increased cell proliferation of glial fibrillary acidic protein (GFAP)-positive cells in the developing central nervous system (PubMed:21349154). Belongs to the augurin family.