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 ?
2 special signals; 4 signal groups for reactive signaling.
Fisher said it takes about three years from the time the need for a new signal is identified until it's up and running - though he hopes to be able to streamline the process.
In another approach, this one adapted from NASA'S Deep Space Network--and already well-known to ham-radio operators--the NIST workers are testing the possibility of detecting a simple signal like the ones used to communicate with distant spacecraft.
PCI design guides recommend routing signal lines along a similar path with trace lengths matching to within 25 mils.
Our selection as developer of the next generation of Band 4 and 5 transmitters for this critical ECM system proves once again that working collaboratively with customers is the most effective way to design products that meet rigorous defense industry requirements," said John Cotumaccio, president and chief operating officer of Signal Technology's Defense Group.
The smart coach will change the live signal every few innings.
At issue before the Tax Court in General Signal was the determination of the account limit of the company's VEBA.
The signal integrity market is still in infancy and we anticipate that it will grow significantly faster than the overall EDA market," said Bob Beachler, industry analyst for Dataquests' Worldwide EDA Market Research Service.
The device offers enhanced signal equalization capabilities for transmitting multi-gigabit data signals across printed circuit boards, through backplane connectors, and over copper cabling used in networking and storage systems.
Echo: Echo is exactly that and is produced by the crossing of (electrical) voice paths, which happens when a signal moves from one type of network to another.
Perhaps the installation of a traffic signal at Satsuma would reduce the standard motorist speed and give those of us in the neighborhood another street to turn onto Magnolia from.
What's more, the extraterrestrials could maximize our chance of picking up the signal by transmitting at frequencies around 1420 MHz, where interstellar gas, dust, and the Earth's atmosphere cause little interference.