Cloning and sequence analysis of two cDNAs encoding cyclin A and cyclin B in the zebra mussel Dreissena polymorpha.

Cyclins are key components in the progression of both mitotic and meiotic cell cycle control. Full-length cDNA clones encoding cyclin A and cyclin B were isolated from a zebra mussel testis cDNA library. The clones contained open reading frames of 419 and 434 amino acids, had similarity to cyclins A and B from other species, but also some unique features in their sequences. Cyclin A and B mRNA was expressed in testis, ovary, gill, mantle, muscle, and eggs, as shown by specific polymerase chain reaction.