signal


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Related to signal: Analog signal

sig·nal

(sig'năl),
1. Something that causes an action or conveys information.
2. A DNA template sequence that alters RNA polymerase transcription.
3. The end product observed when a specific sequence of DNA or RNA is deleted by some method.
4. The message transmitted on binding of an agonist to a receptor.

signal

(sĭg′nəl)
n.
Biology A physical entity, such as a chemical or an electromagnetic wave, that activates a cell receptor and elicits a specific response.
v. sig·naled, sig·naling, sig·nals or sig·nalled or sig·nalling
v.tr.
To cause an effect in (a cell) by the activation of a receptor, as by a neurotransmitter or hormone.

sig′nal·er, sig′nal·ler n.

signal

A measurable or recognisable indicator of an event or process.

signal

Medtalk A measurable or recognizable indicator of an event or process. See Magnetic resonance signal, Sexual body signal.

sig·nal

(sig'năl)
1. Something that causes an action.
2. A DNA template sequence that alters RNA polymerase transcription.
3. The end product observed when a specific sequence of DNA or RNA is deleted by some method.
4. Anything or action that communicates something.

signal

1. audible or visible indications to animals in behavioral conditioning. Many signals have had long-term use in the animal world and are used worldwide. Whoa and Getup, Heel and Sit are common examples. Getawayback is perhaps more colloquial. Many sheepdogs are trained to react to whistles and performing animals are usually trained to react to gestures with the hand.
2. in biochemical terminology relates to staging in reactions; see signal sequence.

signal peptidase
an integral membrane protein located on the luminal surface of the endoplasmic reticulum that cleaves the signal peptide and frees the protein for folding and export.
signal recognition particle (SRP)
a particle composed of six different proteins and one small (7S) RNA that binds to the signal peptide as it emerges from the ribosome, temporarily halting the synthesis of the protein while the complex is transported to the endoplasmic reticulum where the SRP recognizes and docks to a docking protein located on the cytoplasmic surface followed by the transfer of the ribosome to a ribosome receptor on the membrane; the SRP and its docking protein are released from the ribosome and translation resumes.
signal transduction proteins
proteins which may be a protein kinase, an ion channel forming protein (as in nerve cells), or a protein that undergoes some energy dependent change in which the energy is supplied by the hydrolysis of a higher energy compound such as guanosine triphosphate.
References in periodicals archive ?
6 Vehicle signal groups; 2 pedestrian signal groups; 4 tram signal groups; 2 turn signal groups;
Los Angeles motorists will be able to turn left without dodging oncoming traffic at nearly 160 more intersections - including a fair share in the San Fernando Valley - under an $8 million program to bring traffic signals into the 21st century, officials said Wednesday.
They were mapping the effects of the powerful implosion on the signals emitted from a couple of dozen radio transmitters that they had placed in the building before the blasts.
Second, layout designers quickly learn to relax the spacing between PCI Express signal lines so that bumps can be easily added intermittently without impacting the fan-out of the overall PCI Express bus.
As the Army moves forward with its knowledge management and information technology modernization efforts, SIGNAL continues to play an integral role in the Army's transformation," said SIGNAL President & CEO Roger Mody.
The coach can confuse the opponents (hopefully not his catcher) by continually changing the live signal.
Once the Tax Court read a funding requirement into the account limit provision, it turned to whether General Signal intended to establish a reserve to accumulate assets for the payment of post-retirement medical and life insurance benefits.
The VSC3304 is part of Vitesse's crosspoint portfolio capable of detecting and transmitting loss of signal (LOS), allowing native Out-of-Band (OOB) support of SAS/SATA storage protocols.
PSQM compares an original signal with a degraded version to measure the latter's distortion, noise and fidelity.
Many environments bend and bounce signals around so much that they become severely distorted.
Signal installation also is warranted where a need for more restrictive control of right of way assignment has been demonstrated, he said.
The new Agilent N4916A de-emphasis signal converter permits devices to be tested under real-world conditions, including the channel effects caused by gigabit signal transmission over PC board traces," said Siegfried Gross, Agilent's Digital Verification Solutions general manager.