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The molecular mechanisms underlying differential gene expression control during Animals development
Pages 4 (1004 words)
The molecular mechanisms underlying differential gene expression controls during Animals development Name Tutor Course Date Introduction The molecular mechanisms that control gene expression are crucial for cell differentiation and development of an animal.
The role of proteins in cellular function is crucial because they produce the building blocks for cellular structure and form enzymes that catalyze all of the cell's chemical reactions, and regulate gene expression(Alberts, 2002).The transcription of each gene is controlled by regulatory region of DNA approximately near the site where transcription begins. Regulatory regions in animals are complex and act as tiny microprocessors, responding to different kind of signals that they translate and combine to switch the neighboring gene on or off. These switching consists of two types of fundamental components: 1) Short stretch of DNA of defining sequence and 2) Gene regulatory proteins that recognize and bind to them. Moreover, different collections of gene regulatory proteins are existing in different cell types and thereby direct the patterns of gene expression that produce each cell type its special characteristics. In this essay we will focus on some epigenetic mechanisms that are responsible in regulating gene expression in the development of an organism from an undifferential cell, resulting in the successive formation and development of organs and parts that did not pre–exist in the fertilized egg . Firstly, the core histone proteins and linker histones have been described genetically and biochemically as likely repressive to transcriptional initiation. ...
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