Five effective and commonly used bioassay methods including uterine growth assay, vitellogenin of liver cells assay, MCF-7 cells assay, recombinant yeast assay and yeast two-hybrid assay were reviewed, and their applications in recent research on estrogens in environment were also discussed.

Research progress on biochemical character of yolk protein and synthesis sites of vitellogenin in penaeid shrimp;

Detection and immunological relationship of yolk proteins from different parasitoid wasps

At present only the yolk protein of Huso huso♀×Acipenser ruthenus ♂ and Acipenser transmontanus had been studied in all of Acipenser.

Purification and characterization of vitellin from locust Catantops pinguis (Stl) (Orthoptera:Catantopidae);

Molecular characterization and dynamic analysis on vitellin of Propylea japonica (Thunberg) (Coleoptera: Coccinellidae);

Development of monoclonal antibodies to the vitellin in an endoparasitoid,Pteromalus puparum(Hymenoptera: Pteromalidae) and its application methods;

Activation and proliferation of hepatic oval cells in the D-GalN rat model;

Hepatic oval cells(HOC) are the progenitor cells existing in the adult liver,with the capacity to self-renew as well as the ability to generate differentiated cells.

The bile duct source is hepatic oval cell mainly,it partially expresses the marker of liver cell,bile duct epithelial cell and haemopoietic stem cell.