What does Vtg stand for?

Abstract: A cDNA encoding the vitellogenin receptor of the ixodid tick, Haemaphysalis longicornis Neumann (HlVgR) was cloned and characterized.

In fathead minnows, males began producing an egg protein called vitellogenin (normally predominantly found in females) at 9,000 times the usual rate.

Clams receiving the highest bifenthrin dose produced 46 percent more of the protein vitellogenin than did clams in water without insecticides.

All of the male fish in the lake began producing vitellogenin, a precursor to egg proteins, and one-third of the Pearl Dace minnows grew eggs in their testes.

Collection of early fall samples from the commercial catch, followed by histological preparation and classification based on presence or absence of vitellogenin, should yield more accurate maturity information for female petrale sole than winter sampling on spawning aggregations or maturity sampling where only a visual assessment of ovary condition is made.

Schoeb, "Reconnaissance of 17[beta]-estradiol, 11-ketotestosterone, vitellogenin, and gonad histopathology in common carp of United States streams: potential for contaminant-induced endocrine disruption," U.

Bradley [*] ABSTRACT Vitellogenesis, yolk formation in developing oocytes, consists of two processes in insects: vitellogenin (Vg) production by the fat body and Vg uptake by terminal follicles within ovarioles of vitellogenic ovaries.

Results of the study indicate significant differences in sex hormones and vitellogenin, an estrogen-controlled protein necessary for egg development in fish and birds.