Regulation of transcription sometimes occurs via the simple presence or absence of transcription factors. An example of this is in the regulation of the immunoglobulin (an immune protein, also called antibody ) heavy chain gene, which is expressed in B lymphocytes (white blood cells that make antibodies) but not other cell types. This gene's enhancer (a region distant from the promoter) contains at least nine binding sites for regulatory proteins. The enhancer is acted on by activators present in B lymphocytes , while in nonlymphocyte cells repressors are present that inhibit transcription. This limits expression of the gene to lymphocytes.
About Us | Careers | Contact Us | Blog | Homework Help | Teaching Jobs | Sales Jobs | Search Lessons | Answers | Calculator | Worksheets | Formula | Offers | Physics Help | Chemistry Help | Maths Help | Biology | Calculators | Formulas
January 14-18, 2017 - Stop by booth #408 to enter a drawing to win a $250 Amazon Gift Card . While you’re there, we can discuss how we can help you overcome some of the challenges you’re facing in the laboratory. For example, we can discuss how to construct Illumina-compatible DNA fragment libraries that significantly improve the diversity of your libraries and in turn the quality of your NGS data. We can also chat about solutions for successfully amplifying entire genomes from single cells or 1 fg of gDNA with minimal bias. So stop by and see how we can help you.