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folding
Protein folding is the physical process by which a protein chain acquires its native 3-dimensional structure, a conformation that is usually biologically functional, in an expeditious and reproducible manner. It is the physical process by which a polypeptide folds into its characteristic and functional three-dimensional structure from random coil.
Each protein exists as an unfolded polypeptide or random coil when translated from a sequence of mRNA to a linear chain of amino acids. This polypeptide lacks any stable (long-lasting) three-dimensional structure (the left hand side of the first figure). As the polypeptide chain is being synthesized by a ribosome, the linear chain begins to fold into its three-dimensional structure. Folding begins to occur even during translation of the polypeptide chain. Amino acids interact with each other to produce a well-defined three-dimensional structure, the folded protein (the right hand side of the figure), known as the native state. The resulting three-dimensional structure is determined by the amino acid sequence or primary structure (Anfinsen's dogma).The correct three-dimensional structure is essential to function, although some parts of functional proteins may remain unfolded, so that protein dynamics is important. Failure to fold into native structure generally produces inactive proteins, but in some instances misfolded proteins have modified or toxic functionality. Several neurodegenerative and other diseases are believed to result from the accumulation of amyloid fibrils formed by misfolded proteins. Many allergies are caused by incorrect folding of some proteins, because the immune system does not produce antibodies for certain protein structures.Denaturation of proteins is a process of transition from the folded to the unfolded state. It happens in cooking, in burns, in proteinopathies, and in other contexts.
The duration of the folding process varies dramatically depending on the protein of interest. When studied outside the cell, the slowest folding proteins require many minutes or hours to fold primarily due to proline isomerization, and must pass through a number of intermediate states, like checkpoints, before the process is complete. On the other hand, very small single-domain proteins with lengths of up to a hundred amino acids typically fold in a single step. Time scales of milliseconds are the norm and the very fastest known protein folding reactions are complete within a few microseconds.
As the post title says, I want to pick up a Magpul ACR folding stock in black. It looks like F5 makes something similar for $299, so let's say $300 bucks or thereabouts? I don't need weapon-specific adapters, though if anyone has one for a B&T APC9, let's talk...
I have a NIB Law Tactical AR-15/M16 Gen-3-M Folding Stock Adapter. Purchased it and then never built the AR I had in mind and it's just been sitting. (I'm willing to ship and can pay for the USPS amount.) No trades at this time. Thanks you
Law Tactical Information:
Law Tactical's steel adapter...
Used in great condition painted with Brownells Alumahyde FDE. No rust in great working order: comes with screws.
Included is an aftermarket wire cheek riser. Also included is a US made reproduction of the GP25 “baby shoe” buttstock pad.
$175.00 cash, Venmo, or PayPal F&F. Meet FTF in the...
SB tac folding adapter non buffer system Ak style. New no box.
$50 or trade for radian Ambi charging handle or larue mbt flat trigger and I can add few bucks.
Up for grabs is a "Charlie" folding stock from a KelTec SU16C. Great for an SBR project on your PLR16, or to upgrade another SU16 model.
$80, will ship for an additional $10.
Perfect condition, this is an all-factory gun from Ruger.
Called the ITAC, it’s a Talo exclusive and comes with an ATI folding and adjustable stock.
Rarely shot, I’d have to say under 300 rounds. Maybe well under.
-Original owner
-Includes Primary Arms MD10 Red dot optic, mounted on Ruger...
3" 12 gauge 18" Rifle Sight Barrel with ATI AR Style Collapsible Folding Stock.
Original Factory Laminated Stock set with Limbsaver Recoil Pad included.
New 12 gauge Shellholder sling also goes with the gun. IC smoothbore.
I have fired only 30 rounds through this gun since it was new.
Great...
Got this late last year. POLYMER VERSION.
$125….
I had it on a 556 AR converted CMMG .22lr. Gently used with rim fire….
Not a scratch on it and includes lower receiver AR buffer replacement that is new in package.
The pic rail was made in-house by REHV and I think it’s powder coated.
This...
Interesting design. Now way in hades I would pay $1800 for it personally. This may have been posted already but I didn't see a thread on it. Kind of like an improved keltec folder. Perhaps with so many ppl suddenly selling off their PCCs and braces they may turn to this instead I dunno.
Selling my JLG/Eagle Arms folding single shot shotgun in 12ga. Fun gun, just needing space in the safe
Im in Eugene, but would drive to Portland for an added $20.
With all the M114 stuff going on, its on you to call the gunstore of choice to ensure they are taking transfers.
Asking $100
All barrels come with a collar adaptor from Spikes Tactical so you can use your drop in .22 conversion kit just by switching out the chamber adaptor with the collar. These collars will work with CMMG and other Ciener type AR15 conversion Kits. Please note these can be a little finicky about...
New, never used folding brace that I took off my MPX and have had sitting in a cabinet for several months. No use to me, maybe it is to someone else. No idea how this intersects with the DOJ's forthcoming rule. Consult your own lawyer before putting it on any firearm, etc. etc.
$120 shipped.
Shotgun Folding and Extending Stock, Mos/Rem/Win, new condition, never installed. $60 in Eugene
Similar to this one, but not exact match,
https://www.opticsplanet.com/advanced-technology-international-ati-moss-rem-win-12-gauge-adjustable-side-fold.html
SOLD, thanks.
For sale is an used, in nice condition, Gearhead works folding arm adaptor with the tailhook mod1 metal brace included. Locks up tight, very solid setup.
GearHead Works MP5,SP5,AP5 folding arm adaptor with TailHook mod1 brace, built in buffer, sling loop and QD mount.
The GHW...
Looking for a total of two 1913 folding pistol braces, preferably the triangle type but I’m flexible. I have ammo and other items to trade or I can buy outright for a reasonable price.