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.

United States, Science & research, Brain research, Neurofibrils, Ganglion

---

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.

Genetic aspects, Neural receptors

---

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.

Drosophila, Letter to the Editor

Similar abstracts:

• Abstracts: The family tree flowers. The origin and early evolution of plants on land. Turning over a new leaf
• Abstracts: Essential role for ZAP-70 in both positive and negative selection of thymocytes. A mouse knock-in model exposes sequential proteolytic pathways that regulate p27Kip1 in G1 and S phase
• Abstracts: Mad connection to the nucleus. Synexpression groups in eukaryotes. Solving a sticky problem
• Abstracts: Feather mites, pectoral muscle condition, wing length and plumage coloration of passerines. Feather mites (Astigmata) avoid moulting wing feathers of passerine birds
• Abstracts: Factors affecting site fidelity in a territorial animal, Perithemis tenera. Adaptive effects of natal experience on habitat selection by dispersers

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.