T-cell receptor gamma chain C region PT-gamma-1/2 is a protein that in humans is encoded by the TRG@ gene.
T cell receptors recognize foreign antigens which have been processed as small peptides and bound to major histocompatibility complex (MHC) molecules at the surface of antigen presenting cells (APC). Each T cell receptor is a dimer consisting of one alpha and one beta chain or one delta and one gamma chain. In a single cell, the T cell receptor loci are rearranged and expressed in the order delta, gamma, beta, and alpha. If both delta and gamma rearrangements produce functional chains, the cell expresses delta and gamma. If not, the cell proceeds to rearrange the beta and alpha loci. This region represents the germline organization of the T cell receptor gamma locus. The gamma locus includes V (variable), J (joining), and C (constant) segments. During T cell development, the gamma chain is synthesized by a recombination event at the DNA level joining a V segment with a J segment; the C segment is later joined by splicing at the RNA level. Recombination of many different V segments with several J segments provides a wide range of antigen recognition. Additional diversity is attained by junctional diversity, resulting from the random addition of nucleotides by terminal deoxynucleotidyltransferase. Several V segments of the gamma locus are known to be incapable of encoding a protein and are considered pseudogenes. Somatic rearrangement of the gamma locus has been observed in T cells derived from patients with T cell leukemia and ataxia telangiectasia.
Sako TRG-22/42 sniper rifles were developed by the Finnish firearm manufacturer SAKO of Riihimäki. The TRG-22 is designed to fire standard .308 Winchester ammunition, while the TRG-42 is designed to fire more powerful .300 Winchester Magnum and .338 Lapua Magnum ammunition and therefore has a larger action and barrel as standard. The rifles are available with olive drab green, desert tan/coyote brown, dark earth or black stocks, and are also available with a folding stock.
Normally muzzle brakes are fitted to reduce recoil, jump and flash. The Sako factory TRG muzzle brakes vent sideways and are detachable. Generally TRGs are outfitted with a Zeiss or Schmidt & Bender PM IItelescopic sight with fixed power of magnification or with variable magnification. Variable telescopic sights can be used if the operator wants more flexibility to shoot at varying ranges, or when a wide field of view is required.
In 1989 Sako Ltd. (Riihimäki, Finland) introduced the TRG-21 precision rifle as a sniper rifle model chambered for the .308 Winchester cartridge. A more hunting oriented variation of the TRG was later introduced as the TRG-S M995, which uses the same receiver (short action) and bolt (different bolt handle) as the TRG-21 with the exception that the receiver is open at the top rather than possessing a cartridge ejection port on the right side as found with the TRG-21. Subsequently, a second sniper rifle with a 20 mm longer scaled up magnum action emerged as the TRG-41 in order to take advantage of the .338 Lapua Magnum cartridge. Similarly, a hunting variant of this model, again using the same bolt (different bolt handle) and with the receiver open at the top was introduced as the TRG-S M995 Mag in magnum calibres up to .338 Lapua Magnum.
TRG may refer to:
(Tricky and A. Smith -> Aka Ambersunshower ) ...
Ambersunshower :
She's been waiting for that special someone
Anguished by the tears left behind them
Fortifying all that lying
Putrid taste left in her mouth
Chorus :
(Ambersunshower sings while Tricky raps)
Ambersunshower :
Follow me, follow me
Down
Follow me, follow me
Down
Tricky :
Yeah, c'mon
Let's do the maniac
Maniac, bumping like a brainiac
Brainiac, I don't remember [?]
Land me down, touch me down at heathrow
Reach down, the first time I ever feel
Bouncers [face?] on 57th st
Calm down, I feel a cool breeze and
Not particular
I think I found a reason
[For I saw?] what I saw
Ambersunshower :
She's been waiting for that special someone
But then look what she's got left
Fortifying all that lyingputrid taste left in her mouth
Chorus :
(Ambersunshower sings while Tricky raps)
Ambersunshower :
Follow me, follow me
Down
Follow me, follow me
Down
Tricky :
Yeah, c'mon
Let's do the maniac
Maniac, bumping like a brainiac
Brainiac, I don't remember [?]
Land me down, touch me down at heathrow
Reach down, the first time I ever feel
Bouncers [face?] on 57th st
Calm down, I feel a cool breeze and
Not particular
I think I found a reason
[For I saw?] what I saw
A: contamination cramps the surface
blood runs cooler than you flow
she is hiding smiles behind whispers and tears
chaos reaches higher ground
Ambersunshower :
Chaos, chaos, chaos
Ambersunshower :
Follow me, follow me
Down
Follow me, follow me
Down