Molecular Cloning and Characterization of Full-Length cDNA of Calmodulin Gene from Pacific Oyster .

The shell of the pearl oyster () mainly comprises aragonite whereas that of the Pacific oyster () is mainly calcite, thereby suggesting the different mechanisms of shell formation between above two mollusks. Calmodulin (CaM) is an important gene for regulating the uptake, transport, and secretion of calcium during the process of shell formation in pearl oyster. It is interesting to characterize the CaM in oysters, which could facilitate the understanding of the different shell formation mechanisms among mollusks.