Lecture 21x

Lecture 21x - Messenger RNA expression patterns of two...

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4/25/13’ 1’ Messenger RNA expression patterns of two pair-rule genes, even-skipped (red) and fushi tarazu (black) in the Drosophila blastoderm Specific promoter regions of the even-skipped ( eve ) gene control specific transcription bands in the embryo The’enhancer’element’for’stripe’2’regula9on’contains’ binding’sequences’for’several’maternal’and’gap’gene’ proteins’ B,’Bicoid’ C,’Caudal’ G,’Giant’ H,’Hunchback’ K,’Krüppel’ N,’Knirps’ T,’Tailless’ ac9vators’ repressors’ Minimal’enhancer/’regulatory’region:’ ’ 5’bicoid’binding’sites’ ’ 1’hunchback’binding’site’ ’ 3’Hunchback’binding’sites’ ’ 3’giant’binding’sites’ During’development’of’the’cellular’blastoderm,’cell’fates’shi±’from’merely’speciFed’ to’determined.’ Explain’how’this’happens,’including’examples’of’the’genes’and’types’of’gene’ products’that’involved’in’this’process.’ Transcrip9on’paQern’of’fushi’tarazu’ Once’ini9ated’by’the’gap’gene’proteins,’the’transcrip9on’paQern’of’ the’primary’pair-rule’genes’becomes’stabilized’by’interac9ons’among’ their’products.’
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Lecture 21x - Messenger RNA expression patterns of two...

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