Probable lectin that binds selectively to improperly folded lumenal proteins. May function in endoplasmic reticulum quality control and endoplasmic reticulum-associated degradation (ERAD) of both non-glycosylated proteins and glycoproteins (By similarity). Maternally expressed. Levels decrease during gastrulation and are then increasingly up-regulated during neurulation and tailbud stages. Weak ubiquitous expression is detected at all stages of development. Embryos display head and axial defects during organogenesis.