Lewis I. Held Jr's Imaginal Discs: The Genetic and Cellular Logic of Pattern PDF

By Lewis I. Held Jr

ISBN-10: 0511529732

ISBN-13: 9780511529733

ISBN-10: 0521018358

ISBN-13: 9780521018357

ISBN-10: 0521584450

ISBN-13: 9780521584456

A few of the 14,000 genes of Drosophila are concerned with the improvement of imaginal discs. those hole sacs of cells make grownup buildings in the course of metamorphosis, and their research is important to comprehending how a larva turns into a fully-functioning fly. This publication examines the genetic circuitry of the well known 'fruit fly', tackling questions of telephone assemblage and trend formation, of the hows and the whys in the back of the advance of the fly. After an preliminary exam of the proximity as opposed to pedigree imperatives, the e-book delves into bristle trend formation and disc improvement, with complete chapters dedicated to the leg, wing, and eye. huge appendices comprise a word list of protein domain names, catalogues of well-studied genes, and an summary of signaling pathways. greater than 30 wiring diagrams between over 60 special schematics make clear the textual content. No pupil or working towards scientist engaged within the research of Drosophila genetics could be with no this finished reference.

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Additional resources for Imaginal Discs: The Genetic and Cellular Logic of Pattern Formation (Developmental and Cell Biology Series)

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Dl N Su(H) “Transcribe E(spl)-C genes”). Indeed, these same promoters are responsive to activated N in vivo [171]. a. m8) and N had long been presumed because a mutant allele of E(spl) enhances the phenotype of split – an allele of N (hence the gene’s name) [3028, 3896]. Seven genes in the E(spl)-C contain a “basic helixloop-helix” (bHLH) motif (Fig. 4) [2246, 2274]. For bHLH proteins in general, the “basic” domain mediates DNA binding and the helices mediate dimerization [1152, 2634]. Some bHLH proteins form homodimers, others form heterodimers with preferred partners, and still others can do both [68, 245, 2039, 3028, 3029, 3375].

Thus, heterozygous H LOF/+ flies that are also heterozygous for a Su(H) deficiency look nearly wild-type [117]. Conversely, increasing the dose of Su(H) proportionally enhances the phenotype of H LOF/+ flies, as expected for a stoichiometric interaction (Fig. 6c). This titratable antagonism is illustrated most dramatically by the creation of a H LOF phenotype in a wild-type (H +/H + ) background by simply raising the dose of Su(H) to 8 (from its normal 2) [3827]. The identity of the Su(H) “substitute” that H opposes in STP 3 (sheath cell vs.

Like cut, the Bar genes contain a homeobox [1842, 2286], which suggests that SOPs adopt fates via the same kind of logic that operates on a larger scale through bona fide homeotic genes (cf. Ch. 8) [282]. Olfactory sensilla are governed by yet another bHLH gene named “amos” (absent solo-MD neurons and olfactory sensilla, where MD stands for multiple dendritic) [448, 1587, 1928]. Amos (at 36F) and Atonal (at 84F) are more closely related to each other than to the AS-C family (at 1B) [1756]. Indeed, their basic (DNA-binding) IMAGINAL DISCS domains are identical, except for a conservative Arg-toLys change.

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Imaginal Discs: The Genetic and Cellular Logic of Pattern Formation (Developmental and Cell Biology Series) by Lewis I. Held Jr

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