May be involved in a redox-related process. Required for survival and specifically for salivary gland morphogenesis. Secreted into the salivary gland lumen. Expressed in the developing salivary gland at late stages of embryogenesis. Also expressed in brain, neuroblast and wing disk. Expressed both maternally and zygotically, low level of expression in larvae. Expression in embryos is found within syncytial blastoderm, cellular blastoderm and gastrulation stages. Truncated C-terminus.