The expression of five cell cycle control-related genes in the test of mouse at different development stage

These results suggest that: (1)cyclin D1, cdc2, P16 and P21 genes are not related to the regulation of cell cycle during test development and germ genaration, and possibly the machanism of cell cycle regulation during test development and germ genaration is different from other kind of cells; (2)cyclin D1 has other founctions except promoting cell profilation; and (3)the germ genaration during test development may start after 30 days old.