(1) The crystallographic parameters of four different unit cells, all of which are based on hexagonal packing arrangements, indicate that the fundamental unit of the complex is composed of six gene 5 protein dimers.
(2) In this paper, we develop functions suggested by and regression fit to crystallographic data which allow three of these torsion angles, alpha (O3'-P-O5'-C5'), delta (C5'-C4'-C3'-O3') and epsilon (C4'-C3'-O3'-P), to be calculated as dependent variables of those remaining.
(3) The best understood fusion mechanism is that of influenza virus, for which sequences involved in pH-dependent fusion can be correlated with the crystallographic structure of the spike protein.
(4) While X-ray crystallographic data on cytochrome c show the reduced and oxidized forms to have very similar structures, there is a considerable body of data, mostly from solution studies, that indicates the reduced form is more stable and that the interior of the protein is less accessible to solvent in this state.
(5) Given that lattice constraints strongly inhibit large-scale conformational changes these results allow us to identify the average solution structure with the 'open' conformer determined crystallographically.
(6) The two molecules in the asymmetric unit form a dimer with its 2-fold axis perpendicular to and intersecting with a crystallographic 4(1) axis.
(7) The STM topographical arrays and the molecular dimensions obtained are in good quantitative agreement with the corresponding X-ray crystallographic data.
(8) Thus the form IV crystals should yield a crystallographic structure giving insight into the catalytic, receptor-binding and membrane-insertion properties of DT.
(9) The crystallographic orientation of the calcite also appears to be independent of these fibrils.
(10) In order to obtain a better structural framework for understanding the catalytic mechanism of carbonic anhydrase, a number of inhibitor complexes of the enzyme were investigated crystallographically.
(11) The molecular structure of the goose-type lysozyme has been determined at a resolution of a 2.8 A by X-ray crystallographic analysis.
(12) Based on its spectroscopic characteristics and X-ray crystallographic analysis of its bis-(1S)-(-)-camphanate, the structure of depudecin was determined to be (2R,3S,4S,5E,7S,8S,9R)-2,9- dihydroxy-3,4;7,8-diepoxy-undeca-5,10-diene.
(13) Peptide mapping and amino acid sequence analyses have revealed that Val-406 of IgG1 carrying allotype a is substituted for Ile in the case of allotype j. X-ray crystallographic data indicate that Met-398 is in close spatial proximity to Val (Ile)-406.
(14) The data are interpreted, on the basis of available crystallographic structures of chicken mitochondrial aspartate aminotransferase, to indicate that in each case the alteration in 31P chemical shift results from a conformational change in the coenzyme 5' side chain, in which one of the structures involves a near-eclipsed pair of bonds.
(15) They also provide electronic and thermodynamic data that are not available from x-ray crystallographic data.
(16) We have studied the binding of the enzymatically active NAD+ analogue, 3-iodopyridine-adenine dinucleotide, and the inactive analogue, pyridine-adenine dinucleotide to the enzyme horse liver alcohol dehydrogenase using X-ray crystallographic methods.
(17) The crystal-growing conditions and the results of preliminary X-ray crystallographic analysis of (L-Try)A1-insulin and (D-Try)A1-insulin are reported.
(18) Crystallographic studies of the complex between beta-lactamase and clavulanate reveal a structure of two acyl-enzymes with covalent bonds at the active site Ser70, representing two different stages of inhibitor degradation alternately occupying the active site.
(19) (1) urinary calculi after renal transplantation are relatively uncommon; (2) predisposing factors and crystallographic composition of the calculi are identical in type, but not frequency, to those of nontransplant patients; and (3) with proper medical and surgical management, post-transplant urolithiasis does not appear to affect graft prognosis.
(20) This method makes use of crystallographic phases determined from measurements made at several wavelengths and has recently been made technically feasible through the use of intense, polychromatic synchrotron radiation together with accurate data collection from multiwire electronic area detectors.
Crystallography
Definition:
(n.) The doctrine or science of crystallization, teaching the system of forms among crystals, their structure, and their methods of formation.
(n.) A discourse or treatise on crystallization.
Example Sentences:
(1) The amino acid sequence deduced from the open reading frame of the E-type cDNA agreed with the amino acid sequence of the E isoenzyme determined by protein sequencing and x-ray crystallography.
(2) A tertiary-structure model of the active site of this ribozyme has been constructed based on comparative sequence analysis of related group I intervening sequences, data on the accessibility of each nucleotide to chemical and enzymatic probes, and principles of RNA folding derived from a consideration of the structure of tRNA determined by x-ray crystallography.
(3) The structure of asperlicin has been determined by NMR and mass spectral analysis, and X-ray crystallography.
(4) The location of the metal and carbohydrate binding sites, established unequivocally in concanavalin A by high resolution X-ray crystallography, appears to be the same in the other legume lectins.
(5) Five of these 15 protons reside on residues that are found within the epitope as defined by X-ray crystallography.
(6) Specific ion ratios were correlated with crystallography and ultrastructure.
(7) This arrangement is consistent with that of ADP-ribose and zinc in the crystalline complex of liver alcohol dehydrogenase as determined by X-ray crystallography (Branden et al., (1973), Proc.
(8) Molecular structures of three triazenes have been determined using X-ray crystallography.
(9) The delineation of epitopes can be achieved by antigenic cross-reactivity studies or by X-ray crystallography.
(10) The structure of the antimetabolite was finally established to be 7-hydroxyguanine by X-ray crystallography.
(11) The orientations of the porphyrin normals in these deoxy Fe-Co hybrid hemoglobins in terms of the g parallel signals, were closely coincident with those of the heme normals of deoxyhemoglobin determined by x-ray crystallography.
(12) Single molecules of glycogen phosphorylase b exhibit images in the electron microscope which are similar in shape and dimension to those derived from X-ray crystallography.
(13) The structures and absolute configuration of two unique alkaloids isolated from the Colombian frog, Dendrobates histrionicus, have been elucidated by Roentgen-ray (x-ray) crystallography.
(14) We support earlier findings of a greater degree of beta-sheet structure in solution than has been reported by X-ray crystallography and, importantly, the invariant residue associated with neurotoxicity, Trp29, is shown to be in a similar environment to that found in alpha-cobratoxin and LS III from Laticauda semifasciata.
(15) The overall structure, which is almost identical to that found by X-ray crystallography, is disc shaped and consists of a central four component mixed parallel and antiparallel beta-sheet flanked by a 13 residue alpha-helix on one side and the reactive site loop on the other.
(16) The three-dimensional structure of the Bowman-Birk type proteinase inhibitor (PI-II) has been determined by x-ray crystallography and refined at 2.5-A resolution.
(17) (The X-ray crystallography was performed by Kamphuis et al.
(18) The carbon-13 NMR results support previous investigations by halide ion NMR and x-ray crystallography.
(19) Another logical step in their study will be to examine polyhedrin quaternary structure utilizing X-ray crystallography.
(20) By combining the structural data from X-ray crystallography, and the functional data from site-specific mutagenesis a model is proposed for homotropic cooperativity in aspartate transcarbamoylase that suggests that the allosteric transition occurs in a concerted fashion.