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Role of links

There are two main differences between the binary and ternary complexes. In the binary complex, all three phosphoryl groups of dTTP are coordinated to Mn2+, but in the ternary complex with the DNA polymerase only the y-phosphoryl group remains coordinated, while Mn—/3-P and Mn-a-P distances are 4.9 and 4,2 A respectively. The cation has the role of linking the enzyme to the y-phosphoryl group of the substrate to assist the leaving of the pyrophosphate group. [Pg.585]

Migration forms of transition metals are very diverse, numerous and may have complex format [UO ( 03)3][ 0(003)2] etc. Sometimes they even form polynuclear complex compounds, in which ligands play the role of linking bridge between central cations. One example is Fe fOH). Exactly the formation of complex complexes determines migration capabilities of these metals. If noticeable concentrations of any of them are discovered, the solution mandatorily includes their complexes. [Pg.462]

A peptide at 75 kDa was implicated in a role of linking the phycobilisome with the membrane. Alternatively, the peptide observed here at 71 kDa is extremely sensitive to inhibition by levulinic acid, and is more accessible to surface probes in membranes from iron deficient cells. One interpretation of these results is that the peptide observed at 71 kDa serves to link PS II with its major pigment array. [Pg.650]

Farley J M The role of the ECNDT in harmonisation of important links in the NDT quality chain , 1 International East-West Symposium NDT, October 1993... [Pg.956]

Radiation probes such as neutrons, x-rays and visible light are used to see the structure of physical systems tlirough elastic scattering experunents. Inelastic scattering experiments measure both the structural and dynamical correlations that exist in a physical system. For a system which is in thennodynamic equilibrium, the molecular dynamics create spatio-temporal correlations which are the manifestation of themial fluctuations around the equilibrium state. For a condensed phase system, dynamical correlations are intimately linked to its structure. For systems in equilibrium, linear response tiieory is an appropriate framework to use to inquire on the spatio-temporal correlations resulting from thennodynamic fluctuations. Appropriate response and correlation functions emerge naturally in this framework, and the role of theory is to understand these correlation fiinctions from first principles. This is the subject of section A3.3.2. [Pg.716]

The age pigments (lipofuscin), which accumulate with age, aie largely made up of these precipitated Hpid-proteia complexes resultiag from such cross-linking. Vitamin E may function to help prevent formation of these complexes. The metaboHc role of antioxidants (qv) such as vitamin E in animal tissues, however, remains quite controversial. [Pg.428]

The role of activators in the mechanism of vulcanization is as follows. The soluble zinc salt forms a complex with the accelerator and sulfur. This complex then reacts with a diene elastomer to form a mbber—sulfur—accelerator cross-link cursor while also Hberating the zinc ion. The final step involves completion of the sulfur cross-link to another mbber diene segment (18). [Pg.238]

For a radionuclide to be an effective oceanic tracer, various criteria that link the tracer to a specihc process or element must be met. Foremost, the environmental behavior of the tracer must closely match that of the target constituent. Particle affinity, or the scavenging capability of a radionuclide to an organic or inorganic surface site i.e. distribution coefficient, Kf, is one such vital characteristic. The half-life of a tracer is another characteristic that must also coincide well with the timescale of interest. This section provides a brief review of the role of various surface sites in relation to chemical scavenging and tracer applications. [Pg.41]

Desmoplakin is the most abundant desmosomal component that plays a critical role in linking intermediate filament networks to the desmosomal plaque. Desmoplakin forms rod-like dimers that bind to intermediate filaments and to the cadherin-associated proteins plakoglobin and plakophilin. Gene knock-out experiments have revealed an essential role of desmoplakin in establishing cell-cell contacts in early mouse embryos. [Pg.422]

The 3 subunits ((31 -(34) are membrane proteins with a single transmembrane domain and an extracellular immunoglobulin-like motif, and perform the regulatory roles of the sodium channel. The (31 subunit accelerates the activation and inactivation kinetics. The (32 subunit is covalently linked to the a subunit, and is necessary for the efficient assembly of the channel. The more recently identified (33 subunit is homologous to (31, but differs in its distribution within the brain and in a weaker accelerating property. The (34 subunit is similar to (32 and is covalently linked to the a subunit. [Pg.1306]

J 8 Explain the role of chain length, crystallinity, network formation, cross-linking, and intermolecular forces in determining the physical properties of polymers (Section 19.12). [Pg.897]


See other pages where Role of links is mentioned: [Pg.206]    [Pg.399]    [Pg.273]    [Pg.297]    [Pg.579]    [Pg.206]    [Pg.399]    [Pg.273]    [Pg.297]    [Pg.579]    [Pg.2513]    [Pg.2642]    [Pg.30]    [Pg.265]    [Pg.439]    [Pg.135]    [Pg.162]    [Pg.393]    [Pg.535]    [Pg.120]    [Pg.126]    [Pg.372]    [Pg.404]    [Pg.192]    [Pg.124]    [Pg.387]    [Pg.718]    [Pg.204]    [Pg.1004]    [Pg.410]    [Pg.69]    [Pg.1015]    [Pg.1099]    [Pg.1219]    [Pg.1223]    [Pg.942]    [Pg.150]    [Pg.488]   
See also in sourсe #XX -- [ Pg.273 ]




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Glassy Polymers and the Role of Cross-links

The Role of Links

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