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Transducers
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D014159 |
[Any device or element which converts an input signal into an output signal of a different form. Examples include the microphone, phonographic pickup, loudspeaker, barometer, photoelectric cell, automobile horn, doorbell, and underwater sound transducer. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
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Transducers, Pressure
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D014160 |
[Transducers that are activated by pressure changes, e.g., blood pressure.
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Transducin
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D015293 |
[A heterotrimeric GTP-binding protein that mediates the light activation signal from photolyzed rhodopsin to cyclic GMP phosphodiesterase and is pivotal in the visual excitation process. Activation of rhodopsin on the outer membrane of rod and cone cells causes GTP to bind to transducin followed by dissociation of the alpha subunit-GTP complex from the beta/gamma subunits of transducin. The alpha subunit-GTP complex activates the cyclic GMP phosphodiesterase which catalyzes the hydrolysis of cyclic GMP to 5'-GMP. This leads to closure of the sodium and calcium channels and therefore hyperpolarization of the rod cells.
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Transduction, Genetic
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D014161 |
[The transfer of bacterial DNA by phages from an infected bacterium to another bacterium. This also refers to the transfer of genes into eukaryotic cells by viruses. This naturally occurring process is routinely employed as a GENE TRANSFER TECHNIQUE.
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Transendothelial and Transepithelial Migration
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D057705 |
[The passage of cells across the layer of EPITHELIAL CELLS, i.e. the EPITHELIUM.
, The passage of BLOOD CELLS across the layer of ENDOTHELIAL CELLS, i.e., the ENDOTHELIUM.
, The passage of other cells across the layer of ENDOTHELIAL CELLS, i.e., the ENDOTHELIUM. The passge may occur intercellularly via paracellular CELL MIGRATION or intracellularly via TRANSCELLULAR CELL MIGRATION.
, The passage of cells across the layer of ENDOTHELIAL CELLS, i.e., the ENDOTHELIUM; or across the layer of EPITHELIAL CELLS, i.e. the EPITHELIUM.
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Transfection
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D014162 |
[The uptake of naked or purified DNA by CELLS, usually meaning the process as it occurs in eukaryotic cells. It is analogous to bacterial transformation (TRANSFORMATION, BACTERIAL) and both are routinely employed in GENE TRANSFER TECHNIQUES.
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Transfer Agreement
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D014164 |
[A written agreement for the transfer of patients and their medical records from one health care institution to another.
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Transfer Factor
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D014165 |
[Factor derived from leukocyte lysates of immune donors which can transfer both local and systemic cellular immunity to nonimmune recipients.
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Transfer RNA Aminoacylation
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D046249 |
[The conversion of uncharged TRANSFER RNA to AMINO ACYL TRNA.
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Transfer, Psychology
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D014163 |
[Change in learning in one situation due to prior learning in another situation. The transfer can be positive (with second learning improved by first) or negative (where the reverse holds).
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Transferases
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D014166 |
[Transferases are enzymes transferring a group, for example, the methyl group or a glycosyl group, from one compound (generally regarded as donor) to another compound (generally regarded as acceptor). The classification is based on the scheme "donor:acceptor group transferase". (Enzyme Nomenclature, 1992) EC 2.
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Transferases (Other Substituted Phosphate Groups)
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D017855 |
[A class of enzymes that transfers substituted phosphate groups. EC 2.7.8.
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Transference, Psychology
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D014167 |
[The unconscious transfer to others (including psychotherapists) of feelings and attitudes which were originally associated with important figures (parents, siblings, etc.) in one's early life.
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Transferrin
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D014168 |
[An iron-binding beta1-globulin that is synthesized in the LIVER and secreted into the blood. It plays a central role in the transport of IRON throughout the circulation. A variety of transferrin isoforms exist in humans, including some that are considered markers for specific disease states.
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Transferrin-Binding Protein A
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D033881 |
[A subtype of bacterial transferrin-binding protein found in bacteria. It forms a cell surface receptor complex with TRANSFERRIN-BINDING PROTEIN B.
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Transferrin-Binding Protein B
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D033882 |
[A subtype of bacterial transferrin-binding protein found in bacteria. It forms a cell surface receptor complex with TRANSFERRIN-BINDING PROTEIN A.
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Transferrin-Binding Proteins
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D033863 |
[A class of carrier proteins that bind to TRANSFERRIN. Many strains of pathogenic bacteria utilize transferrin-binding proteins to acquire their supply of iron from serum.
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Transferrins
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D061250 |
[A group of iron-binding proteins that tightly bind two ferrate ions along with two carbonate ions. They are found in the bodily fluids of vertebrates where they act as transport and storage molecules for iron.
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Transformation, Bacterial
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D014169 |
[The heritable modification of the properties of a competent bacterium by naked DNA from another source. The uptake of naked DNA is a naturally occuring phenomenon in some bacteria. It is often used as a GENE TRANSFER TECHNIQUE.
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Transformation, Genetic
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D014170 |
[Change brought about to an organisms genetic composition by unidirectional transfer (TRANSFECTION; TRANSDUCTION, GENETIC; CONJUGATION, GENETIC, etc.) and incorporation of foreign DNA into prokaryotic or eukaryotic cells by recombination of part or all of that DNA into the cell's genome.
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