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 ?
Signaller Hayes said: "It has been great living in London and being part of a very traditional military parade.
Signaller Didsbury, of Blackpool, was unmarried and had been in Iraq as part of a hand-over, with the joint helicopter force serving the Army, Navy and Air Force.
Bulkington branch, RBL at their meeting last week have forwarded a donation of pounds 100 to Lt Gurung to assist the continued education of Signaller Dhurbakumar's sister.
Signaller Bland, of 16 Signal Regiment, died on Monday near Kabul in an attack highlighting a growing revolt close to the capital.
She said the incident happened after a joiner "took it upon himself" to control the crane lift instead of a nominated signaller.
A group of the serving soldiers were planning to celebrate the end of the tour with a long weekend in Blackpool and Signaller Bland, from Leeds, was intending to visit Teesside to stay with his colleague's family.
The third charity to benefit will be Project Bland, named after a fellow Signaller who died in service in Kabul.
A BRITISH solider who died at a base in southern Afghanistan has been named by the Ministry of Defence as Signaller Ian Sartorius-Jones.
DISCOVERY 3 The crash site BURIAL3 At the graveside TRAGIC J From left, signaller Thomas O'Toole, driver Roy Wilson, navigator Geoff Carpenter, driver Oliver Goldsmith and Corporal Phillip Bryant CRASHED Z A Dakota
A DRIVER ignored warnings to telephone the signaller for permission to cross a level crossing in Carmarthenshire moments before a train was in collision with his lorry, investigators have said.
One of his colleagues added: "Alan had to choose between pushing a button to alert the signaller or saving this lady.