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An egg yolk precursor protein; production is stimulated by estrogens.
[L. vitellus, egg yolk, + -gen + -in]
References in periodicals archive ?
The major components of fish eggs are yolk proteins (YPs) derived from circulating precursors, vitellogenins (Vtgs).
Gender-specific expression of multiple estrogen receptors, growth hormone receptors, insulin-like growth factors and vitellogenins, and effects of 17 beta-estradiol in the male tilapia (Oreochromis mossambicus).
Davis et al [32] indicate that o,p'-DDE and heptachlor (allogenous endocrine disruptors) have varying temporal and dose effects on modulation of vitellogenin Vg and the GH/IGF-I axis that are distinct from 17beta-estradiol E(2) in the tilapia, Oreochromis mossambicus.
This observed reduction in fecundity suggests that humoral antibodies, somehow, interfere with the normal process of oogenesis as the ovarian proteins/ insect vitellogenins are synthesized by the female fat body and are transferred in the hemolymph; these vitellogenins are then selectively sequestered to the developing oocytes by receptor mediated endocytosis and are stored in yolk granules (24).
Vitellogenins and vitellins in the bean bug, Riptortus clavatus (Hemiptera: Alydidae): purification, immunological identification, and induction by juvenile hormone.
Effect of age, diet, diapause and juvenile hormone on oogenesis and the amount of vitellogenin and vitellin in the twospotted stink bug, Perillus bioculatus (Heteroptera: Pentatomidae).
Among their topics are the biosynthesis and processing of insect vitellogenins, the regulation of yolk protein gene expression and vitellogenesis in higher diptera, vitellogenesis directed by juvenile hormone, the accumulation of lipids in insect oocytes, the regulation of yolk protein degradation during insect enbryogenesis, and biochemical and ultrastructural aspects of vitellin utilization during embryogensis.
Putative vitellogenins in the fresh water mussel Elliptio complananta, Boston University, Society for the Study of Reproduction, Annual Meeting.
Several genes known to be activated by this process include those that encode the ER itself, vitellogenins (Vtgs), and choriogenins (Arukwe et al.
During vitellogenesis, the fat body of Acheta domesticus produces and secretes two multisubunit vitellogenins (VGs; 352 kDa and 357 kDa) into the hemolymph.
Estrogenic activity in five United Kingdom rivers detected by measurement of vitellogenins in caged male trout.
Fertility and hatching success were more sensitive to estrogenic disruption than were gonad differentiation and vitellogenin expression.