vitellogenin การใช้

• Examples of such necessary liver proteins are vitellogenin and choriogenin.
• Vitellogenin is an dose dependent manner.
• Usually, vitellogenin is only produced by female fish, because it is estrogen-dependent.
• The unique negative relationship between JH and Vitellogenin may be important to the understanding of queen longevity.
• The yolk consists of lipids ( triglycerides, cholesterol etc . ) and proteins, mainly vitellogenin.
• Vitellogenin and juvenile hormone likely work antagonistically in the honey bee to regulate the honey bees development and behavior.
• In insects, it starts when the fat body stimulates the release of juvenile hormones and produces vitellogenin protein.
• In mammalian vitellogenesis, vitellogenin is the major protein, produced by the Vit gene and regulated by oestrogen.
• The vitellogenin expression is part of a regulatory feedback loop that enables vitellogenin and juvenile hormone to mutually suppress each other.
• The vitellogenin expression is part of a regulatory feedback loop that enables vitellogenin and juvenile hormone to mutually suppress each other.
• Juvenile hormone levels drop in honey bee colonies pre-swarming and it is expected that vitellogenin levels would therefore rise.
• In particular, certain amino acids found in the blood proteins seem to be necessary for the activation of the vitellogenin gene.
• Vitellogenin precursors provide the major egg yolk proteins that are a source of nutrients during early development of oviparous vertebrates and invertebrates.
• Vitellogenin, a sex-specific protein, is synthesized in the liver of fish in response to estrogen, a female hormone.
• Quantification of vitellogenin is performed by measuring competitive binding to an enzyme in the presence of another identifiable protein, usually one that fluoresces.
• An example is that expression of the egg yolk precursor protein vitellogenin can be measured by the E-SCREEN test in juvenile brown trout.
• If they are abundantly fed, immediately after emergence, their vitellogenin titer is high and they begin foraging later in life, preferentially collecting pollen.
• Exposure to estrogens ( xenoestrogens ) may be also easily assessed in fish, reptiles or birds by measuring their vitellogenin ( VTG ) plasma levels.
• Hence, a frequently used biomarker of exposure to estrogen active substances in the environment is the measurement of vitellogenin levels in male and juvenile trout.
• In addition, xenoestrogens stimulate vitellogenin ( Vtg ), which acts as a nutrient reserve, and Zona readiata proteins ( Zrp ), which forms eggshells.