Location and structures

Janin, J., Chothia, C. Domains in proteins definitions, location and structural principles. Methods Enzymol. 115 420-430, 1985. 

Crucial in determining the progress (or lack of it) of this type of reaction is the location and structure of the solid product in relation to the solid reagent. Thus, whilst a solid block of copper or a solid block of thorium will remain stable in the atmosphere at room temperature with only some surface oxidation, a solid block of certain intermetallic... 

Like conventional enzymes, transport proteins often are sensitive to specific inhibitors. For example, the anion transporter of the erythrocyte plasma membrane, which moves HC03- and Cl- ions across the membrane, is inhibited by 1,2-cyclohexadione or derivatives of stilbenedisul-fonate. Because these inhibitors react covalently with amino acid residues of the protein, they afford useful probes for the location and structure of the anion-binding site. 

Hallberg E. and Subchev M. (1997) Unusual location and structure of female pheromone glands in Theresimima (=Ino) ampelophaga Bayle-Berelle (Lepidoptera Zygaenidae). Int. J. Insect Morphol. Embryol. 25, 381-389. 

A way to ascertain the coordination state of the anchored ions and, hence, their accessibility to adsorbing molecules is represented by the quantification of their capacity to adsorb molecular probes such as CO (and NO) and by the measurement of the IR spectrum of the resulting surface carbonyls (and nitrosyls). Thus, we obtain information about the propensity of the surface ions to insert ligands in their incomplete coordination spheres and, hence, indirect information about the location and structure of sites existing prior to adsorption. Of course, as mentioned previously, the probing with complexing molecules is always associated with a perturbation of the surface structures (this phenomenon is equivalent to surface relaxation). This unavoidable effect must be considered when structures of sites prior to adsorption are proposed. 

The present paper summarises our recent results relating to the location and structure of the reaction centres of photosystems I and II, with particular reference to the organisation of the chlorophyll-proteins and the transfer of excitation energy from antennae to the reaction centres. 

The main considerations in mold design effecting product shrinkage are to provide, for instance, with IM of RTPs, adequate cooling, proper gate size and location, and structural rigidity. Of these three, cooling conditions is the most critical, especially for crystalline TPs. 

J. M. Estevez, M. Ciancia, and A. S. Cerezo, The system of sulfated galactans from the red seaweed Gymnogongrus torulosus (Phyllophoraceae, Rhodophyta) Location and structural analysis, Carbohydr. Potym., 73 (2008) 594-605. 

Nor is a member of the superfamily of heme-copper oxidases that also include the cytochrome oxidases (found e.g. in mitochondria ). Although no crystal structure of Nor is known at present, the number of transmembrane a-helices and the location and structure of their cofactors (heme c, heme b, heme bs and Fee) are highly similar to those of the cytochrome oxidases. 

Location and structural features are sufficient to confirm CP papillomas in many cases. 

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