We have previously reported that cathepsin L mRNA is present in unfertilized eggs of Sarcophaga peregrina (flesh fly) as a maternal mRNA, which suggests that cathepsin L is required for embryogenesis. Now we have identified an egg protein, with a molecular mass of 100 kDa, that is extremely
1. Digestion in the hoplonemertean Paranemertes peregrina is achieved by a combination of extra- and intracellular processes. The extracellular phase, effected in an acidic medium, involves endopeptidases secreted by the gastrodermal columnar cells, and other, as yet unidentified, substances