Construct: 288bp HaeII fragment of Anthera polyphemus (silkmoth) chorion cDNA is inserted into the HaeII site 14 codons upstream from the carboxy-terminus of Cp15. The 5' limit of the Cp15 sequences is a BglII site at position -814 and the 3' limit is the SalI site at position +778 (185bp downstream of the polyA addition site).