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الفصل 10
تعبير جينى محدد بالخلية
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same…
تنظيم التعبير الجينى يحدث فى خطوات متعددة
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves…
تتابعات سيس المنظمة
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These…
ربط تعاونى لمنظمى النسخ
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences…
منشطات النسخ والمثبطات فى بدائية النواة
The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the…
جينات المَشغلات
Prokaryotes can control gene expression through operons—DNA sequences consisting of regulatory elements and clustered, functionally related…
المنطقة المحفزة فى حقيقية النواة
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start…
المنشطات المساعدة و المثبطات المساعدة
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in…
منشطات النسخ فى حقيقىة النواة
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate…
مثبطات النسخ فى حقيقية النواة
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding…
التحكم الجينى الاندماجى
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of…
خلايا جذعية بقوة نفاذية خلوية محفزة
Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific…
منظمات النسخ الرئيسية
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often…
تنظيم الوراثة الفوقية
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases…
النسخ الجينى و الوراثة
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both…
منصة Seq الميثيل الفئران لتحديد تغييرات جينية المرتبطة بالتعرض للإجهاد
As genomes of a wider variety of animals become available, there is an increasing need for tools that can capture dynamic epigenetic changes in these…
تحديد سمات تعبير الجينات الخاص بنوع الخلية في كبد الماوس
Liver repopulation after injury is a crucial feature of mammals which prevents immediate organ failure and death after exposure of environmental…

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