signal

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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 ?
High-reliability organizations distinguish themselves from others because of their mindfulness which enables them to see the significance of weak signals and to give strong interventions to weak signals.
To have a manageable number of elements from which to build the scenarios, the implications wheels process must winnow the long list of weak signals to just a few significant impacts.
Weak signals, on the other hand, are trickier to define.
As a result, the receiver must have an extremely wide dynamic range with enough sensitivity to recover the weak signals accurately without being swamped by the stronger ones.
Dead zones are eliminated and weak signals are strengthened to ensure reliable communications.
The first step in the IRI2038 journey is a discovery phase, designed to map out the forces likely to shape our future through a futures audit and weak signals scan.
Other recent weak signals include a much-worse-than-expected 4.
The relatively inexpensive 'plug and play' devices allow the incredibly weak signals from cosmic bodies trillions of miles away to pass unhindered, but screen out any unwanted interference from terrestrial sources such as mobile phones and television transmitters.
Peripheral vision; detecting the weak signals that will make or break your company.
Knife fish mostly cruise murky water at night and emit weak signals to communicate and scan for obstructions.
Wilson amplifiers' advanced circuit design and high receiver sensitivity allow them to receive weak signals that would go undetected by most cell phones.
A number of consumers using various internet services regularly face problems mainly because of weak signals which cause delay in opening the required account, website and downloading.