Vitellin and vitellogenin
quantification: The vitellogenins
quantification was made, on fat body samples collected at different ages (0, 1, 3, 5 and 7 days), in female pupae of controls and treated series.
Our results show that sea stars contain two vitellogenins
, Vtg 1 and Vtg 2, and MYP.
The major components of fish eggs are yolk proteins (YPs) derived from circulating precursors, vitellogenins
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).
littoralis, also inhibited the synthesis of vitellogenins
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).
and vitellins in the bean bug, Riptortus clavatus (Hemiptera: Alydidae): purification, immunological identification, and induction by juvenile hormone.
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.
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.
Genomic and proteomic analyses reveal non-neofunctionalized vitellogenins
in a basal clupeocephalan, the Atlantic herring, and point to the origin of maturational yolk proteolysis in marine teleosts.