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Subject receptor

Olfactory receptors have been a subject of great interest (9). Much that has been postulated was done by analogy to the sense of sight in which there are a limited number of receptor types and, as a consequence, only three primary colors. Thus attempts have been made to recognize primary odors that can combine to produce all of the odors that can be perceived. Evidence for this includes rough correlations of odors with chemical stmctural types and the existence in some individuals having specific anosmias. Cross-adaptation studies, in which exposure to one odorant temporarily reduces the perception of a chemically related one, also fit into this hypothetical framework. Implicit in this theory is the idea that there is a small number of well-defined odor receptors, so that eventually the shape and charge distribution of a specific receptor can be learned and the kinds of molecular stmctures for a specified odor can be deduced. [Pg.85]

Smooth muscle contractions are subject to the actions of hormones and related agents. As shown in Figure 17.32, binding of the hormone epinephrine to smooth muscle receptors activates an intracellular adenylyl cyclase reaction that produces cyclic AMP (cAMP). The cAMP serves to activate a protein kinase that phosphorylates the myosin light chain kinase. The phosphorylated MLCK has a lower affinity for the Ca -calmodulin complex and thus is physiologically inactive. Reversal of this inactivation occurs via myosin light chain kinase phosphatase. [Pg.560]

Traumatic brain injury is the most common cause of death in subjects under the age of 40, and an important risk factor for AD. Loss of hippocampal cells and depletion of ACh and of muscarinic receptors can be attenuated in injured experimental animals, improve blood perfusion in ischemic areas and increase cholinergic transmission in cortex and hippocampus the same mechanism invoked for treatment of VD. [Pg.360]

HT4, 5-HTcAMP formation, yet they are regarded as distinct receptor classes because of their limited (<35%) overall sequence identities. This subdivision is arbitrary and may be subject to future modification. [Pg.1124]

Two NKxr splice variants have been identified (Table 3). A NKxr splice variant having a very short C-terminal intracellular tail (7 instead of 96 amino acids), which has been expressed and characterized in recombinant systems (Fig. 1), was found to be expressed at higher level than the long isoform in breast cancer cells. As compared to the long receptor, the short NKxr isoform is less subjected to desensitization and internalization... [Pg.1184]

Low K, Crestani F, Keist R, et al Molecular and neuronal substrate for the selective attenuation of anxiety. Science 290 131-134, 2000 Luddens H, Pritchett DB, Kohler M, et al Cerebellar GABAA receptor selective for a behavioural alcohol antagonist. Nature 346 648—651, 1990 LupoloverY, Safran AB, Desangles D, etal Evaluation ofvisual function in healthy subjects after administration of Ro 15-1788. Eur J Clin Pharmacol 27 505-507, 1984 Maher JF, Schreiner GE, Westervelt FB Jr Acute glutethimide intoxication 1. clinical experience (twenty-two patients) compared to acute barbiturate intoxication (sixty-three patients). Am J Med 33 70-82, 1962 Marks J The Benzodiazepines Use, Overuse, Misuse, Abuse. Baltimore, MD, University Park Press, 1978... [Pg.156]


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See also in sourсe #XX -- [ Pg.68 , Pg.69 ]




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Olfactory receptors Subject

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