The pyrrolidine rings keep out of each other ’ s way when the polypeptide chain assumes this extended helical form, which is much more open than the tightly coiled form of the alpha helix.

To a small extent, hemoglobin A slowly combines with glucose at the terminal valine ( an alpha aminoacid ) of each β chain.

Most nuclear fuels undergo spontaneous fission only very slowly, decaying instead mainly via an alpha / beta decay chain over periods of millennia to eons.

The RIKEN team produced a further atom on April 2, 2005, although the decay data were slightly different from the first chain, perhaps due to either the formation of a meta-stable isomer or one alpha particle escaping from the detector before depositing its full energy.

This decay chain differed from the previous observations at RIKEN mainly in the decay mode of dubnium, which was previously observed to undergo spontaneous fission, but in this case instead alpha decayed ( leading to a further alpha decay of daughter species lawrencium ).

Because the alpha decay of dubnium-262 to lawrencium-258 is well studied, this provides an unambiguous anchor for the decay chain.

A special debranching enzyme is needed to remove the alpha ( 1-6 ) branches in branched glycogen and reshape the chain into linear polymer.

At this stage the thymocyte must produce a TCRβ beta chain that can be translated into protein and travel to the cell surface with a Pre-T alpha chain.

TCRs have two parts, usually an alpha and a beta chain.

( also known as pseudo-vWD or platelet-type vWD ) Platelet-type vWD is an autosomal dominant type of vWD caused by gain of function mutations of the vWF receptor on platelets ; specifically, the alpha chain of the glycoprotein Ib receptor ( GPIb ).

It breaks down amylose ( straight chain starch ) and amylopectin ( branched starch ) by hydrolyzing alpha 1, 4 bonds.

The 7 transmembrane spanning domains, with an external amino terminus, is often claimed as being alpha helix shaped, and the polypeptide chain is said to be composed of ~ 450-550 amino acids.

Each chain has seven transmembrane alpha helices and contains one molecule of retinal buried deep within, the typical structure for retinylidene proteins.

Tissue plasminogen activator has been shown to interact with Fibrinogen alpha chain, LRP1 and SERPINI1.

LH and FSH are heterodimers consisting of two peptide chains, an alpha chain and a beta chain.

LH and FSH share nearly identical alpha chains ( about 100 amino acids long ), whereas the beta chain provides specificity for receptor interactions.

Superantigens bind first to the MHC Class II and then coordinate to the variable alpha or beta chain of T-cell Receptors ( TCR )

* Low or no cell-surface expression of CD25 ( also called the Interleukin-2 receptor alpha chain, or p55 ).

IL-2 signals through a receptor complex consisting of IL-2 specific IL-2 receptor alpha ( CD25 ), IL-2 receptor beta ( CD122 ) and a common gamma chain ( γc ), which is shared by all members of this family of cytokines.

The large majority of Foxp3-expressing regulatory T cells are found within the major histocompatibility complex ( MHC ) class II restricted CD4-expressing ( CD4 < sup >+</ sup >) helper T cell population and express high levels of the interleukin-2 receptor alpha chain ( CD25 ).

Glycation of proteins is a frequent occurence, but in the case of hemoglobin, a nonenzymatic reaction occurs between glucose and the amino-terminal valine ( N-terminal end ) of the alpha chain.

For example, the most common hemoglobin sequences in humans and chimpanzees are nearly identical, differing by only one amino acid in both the alpha and the beta globin protein chains.

Most of the amino acids in hemoglobin form alpha helixes, connected by short non-helical segments.

The birds have a specialized variant of the hemoglobin alpha < sup > D </ sup > subunit ; this protein has a high affinity for oxygen, which allows the species to take up oxygen efficiently despite the low partial pressure in the upper troposphere.

As well as alpha and beta chains present in hemoglobin, about 3 % of adult hemoglobin is made of alpha and delta chains.

Whereas adult hemoglobin is composed of two alpha and two beta subunits, fetal hemoglobin is composed of two alpha and two gamma subunits, commonly denoted as α < sub > 2 </ sub > γ < sub > 2 </ sub >.

The hemoglobin protein is made of two subunits ( alpha and beta ).

Multimers made up of identical subunits are referred to with a prefix of " homo -" ( e. g. a homotetramer ) and those made up of different subunits are referred to with a prefix of " hetero -" ( e. g. a heterotetramer, such as the two alpha and two beta chains of hemoglobin ).

There are homotetramers ( all subunits are identical ) such as glutathione S-transferase or single-strand binding protein, dimers of hetero-dimers such as hemoglobin ( a dimer of an alpha / beta dimer ), and heterotetramers, where each subunit is different.

The crystal lattice of solid americium and its compounds contains intrinsic defects, which are induced by self-irradiation with alpha particles and accumulate with time ; this results in a drift of some material properties.

Centaurus contains several very bright stars because of its position in the Milky Way ; in addition, its alpha and beta stars are used to find the constellation Crux.

Tea contains L-theanine, and its consumption is strongly associated with a calm but alert and focused, relatively productive ( alpha wave dominant ), mental state in humans.

The back end of the nuclear fuel cycle, mostly spent fuel rods, contains fission products that emit beta and gamma radiation, and actinides that emit alpha particles, such as uranium-234, neptunium-237, plutonium-238 and americium-241, and even sometimes some neutron emitters such as californium ( Cf ).

It also contains two domains comprising 6 alpha helices apiece, which allow the protein to cross the cell membrane.

If a Rete contains no beta network, alpha nodes feed tokens, each containing a single WME, directly to p-nodes.

An alpha Stirling contains two power pistons in separate cylinders, one hot and one cold.

Due to the alpha decay of thorium and uranium, monazite contains a significant amount of helium, which can be extracted by heating.

The 3 ' UTR of TNF alpha contains an AU-rich element ( ARE ).

The protein dimer contains 2 glycopeptidic subunits, labeled alpha and beta subunits, that are non-covalently associated ( i. e., without any disulfide bridge linking them ):

The protein dimer contains 2 polypeptide units, labeled alpha and beta subunits.

Ras contains a six-stranded beta sheet and 5 alpha helices:

Echium oil contains high levels of alpha linolenic acid ( ALA ), gamma linolenic acid ( GLA ) and stearidonic acid ( SDA ), making it valuable in cosmetic and skin care applications, with further potential as a functional food, as an alternative to fish oils.

If the enolate contains a stereocenter in the alpha position, excellent stereocontrol may be realized.

The front side of the neck region consists of a five-stranded beta-sheet and two alpha helices whereas the back side is a three-stranded beta-sheet The shoulder part of the N-terminal domain contains an < alpha-helical and beta-sheet region.

Colostrum also contains a number of growth factors, such as insulin-like growth factors I, and II, transforming growth factors alpha, beta 1 and beta 2, fibroblast growth factors, epidermal growth factor, granulocyte-macrophage-stimulating growth factor, platelet-derived growth factor, vascular endothelial growth factor, and colony-stimulating factor-1.

The conversion of an acid catalyzed enol to the keto form proceeds by a two step mechanism in an aqueous acidic solution. For this it is necessary that the alpha carbon ( carbon closest to functional group ) contains at least one hydrogen atom known as alpha hydrogen. This atom is removed from the alpha carbon and bonds to the oxygen of the carbonyl carbon to form the enol tautomer.

The only parallel organelle in physiology is the alpha granule of platelets, which also contains vWF.

Because an alpha particle contains a positive charge and kinetic energy, the particle can hit a memory cell and cause the cell to change state to a different value.

The structure of epoxide hydrolase B reveals that the enzyme is a monomer and contains an alpha / beta hydrolase fold.

Currently, SheerVideo contains specific codecs for real-time lossless encoding and decoding of RGB data ( for digitized film and CGI ) as well as Y ' CbCr data ( for video ); with or without an alpha ( A ) channel for compositing ; at a precision of 10 or 8 bits per channel ; fully sampled ( 4: 4: 4 ) or 2: 1 chroma-subsampled ( 4: 2: 2 ); and progressive-scan ( p ) or interlaced ( i ):