Enhancer Mediated Mechanisms of Transcription
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Описание:
During development of all multicellular animals, specific genes are differentially expressed with respect to position and time. This differential expression establishes anterior-posterior (A-P) and dorsal-ventral (D-V) polarity and leads to the specification of different cell fates in different positions within the body plan. In Drosophila, a cascade of genetic interactions controls the pattern along the A-P axis. The pair-rule gene even-skipped (eve) which is expressed in a seven stripe periodic pattern in the early embryo, plays a critical role in this process. The eve locus has distinct regulatory regions (enhancers) that drive expression of individual stripes or pairs of stripes. These enhancers are regulated by transcription factors encoded by genes that act earlier in development. Two enhancers (eve 2 and eve 3Похожие книги
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