Shannon R. Stewart

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Insects use taste to evaluate food, hosts, and mates. Drosophila has many "orphan" taste neurons that express no known taste receptors. The Ionotropic Receptor (IR) superfamily is best known for its role in olfaction, but virtually nothing is known about a clade of ∼35 members, the IR20a clade. Here, a comprehensive analysis of this clade reveals expression(More)
We examine in Drosophila a group of ∼35 ionotropic receptors (IRs), the IR20a clade, about which remarkably little is known. Of 28 genes analyzed, GAL4 drivers representing 11 showed expression in the larva. Eight drivers labeled neurons of the pharynx, a taste organ, and three labeled neurons of the body wall that may be chemosensory. Expression was not(More)
BACKGROUND Rho1 is a small GTPase of the Ras superfamily that serves as the central component in a highly conserved signaling pathway that regulates tissue morphogenesis during development in all animals. Since there is tremendous diversity in the upstream signals that can activate Rho1 as well as the effector molecules that carry out its functions, it is(More)
The goal of our research was to create a synthetic gene construct and insert it into the Arabidopsis thaliana genome to visualize the localization and expression of the AT1G52340 gene. AT1G52340 is a known ortholog of a gene in maize (GRMZM2G332976) that is known to function in sex determination. By studying the AT1G52340 gene in Arabidopsis, we hoped to(More)
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