Vitellogenesis in the sand shrimp, metapenaeus ensis: the contribution from the hepatopancreas-specific vitellogenin gene (MeVg2).

An additional vitellogenin gene (MeVg2) that is structurally different from MeVg1 was cloned and characterized from the shrimp Metapenaeus ensis. The MeVg2 gene consists of fewer exons-introns and is most likely evolved from the MeVg1 gene. The cDNA for MeVg2 is 8.