Two gradients are better than one
Article Abstract:
The retinotopic map was first elaborated by Roger Sperry who proposed that the chemicals on retinal ganglion cells (RGC) axons and in the tectum form gradients, such that the amounts of a tag could specify different positions. A single gradient-counter gradient of ligand receptor is not necessarily sufficient to specify an axis and models propose that additional forces such as a second counter balancing gradient or axon-axon competition are necessary.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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Cloning and expression of odorant receptors
Article Abstract:
Two genes expressing odorant receptors have been cloned and sequenced using the polymerase chain reaction. The genes produce receptors that enable the olfactory system to detect two chemicals, cyclic adenylic acid and inositol trisphosphate. This discovery provides additional support for the theory that the sense of smell results from olfactory neurons being able to recognize odorous molecules through G-protein-linked receptor proteins.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Target neuron prespecification in the olfactory map of Drosophila
Article Abstract:
Research is presented concerning the use of the Mosaic Analysis with a Repressible Cell Marker method to determine the systematic clonal analysis of projection neurons in order to produce an olfactory map for the fruit fly Drosophila.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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