(1) The dimensions and shape of the head are compatible with those of a regular icosahedron.
(2) These data showed the feasibility of the insertion of foreign sequences in a specific antigenically active locus of the poliovirus icosahedron, and suggest some limitations with respect to the sequences to be 'transplanted'.
(3) Older cultures revealed clusters of icosahedrons some of which degenerated spontaneously; others were surrounded by proteinic structure having a fringed aspect.
(4) Icosahedron-shaped particles with an average diameter of 33 nm were liberated by treatment of the fraction with the detergent Tween 80.
(5) Electron microscopic studies demonstrated that purified virions have a typical adenovirus morphologic characteristic, with 50-nm-long fiber projections at each vertex of an 80-nm-diameter icosahedron.
(6) The internal space of an icosahedron can optimally be filled by 12 geometrical figures each of which is a combination of a cone and more than half of a sphere.
(7) Phage Bam35 is an icosahedron of about 63 nm in diameter.
(8) These data predict that the nucleocapsid contains 240 copies of protein and is a T = 4 icosahedron.
(9) The virus is composed of 32 hollow morphological units representing a regular T = 3 icosahedron.
(10) Treatment of single-capsid rotavirus particles with 30% formamide or 5 M-urea resulted in their degradation, giving rise to very similar products, corresponding to isolated vertices, edges and faces of the virus icosahedron.
(11) This virus was an icosahedron of 145 nm and most likely to be placed in the family Iridoviridae.
(12) Approximately 15 molecules of IX were found per group of nine hexons and from considerations of symmetry it seemed possible that IX was located at the 'corner to edge' contacts between hexons in the icosahedron.
(13) This paper describes a method for the rapid searching of rotational three-dimensional space, relying on the symmetries of the regular icosahedron and dodecahedron.
(14) We have found that E1-E2 heterodimers, which form the virus protomeric units, exist in two conformationally distinct forms, reflecting their nonequivalent positions in the icosahedron.
(15) The model capsid is defined by the underlying icosahedron, of edge 445 A, upon which hexons are arranged.
(16) The virus was sensitive to the action of lipid solvents and trypsin and was rapidly inactivated at pH 3.0 and at temperatures of 50 and 56 C. The virion, an icosahedron consisting of a nucleoid surrounded by a double membrane, measured approximately 135 nm in diameter.
(17) Protein-protein associations have been identified which participate in the formation of the icosahedron and these associations are stabilized by intramolecular disulfide bridges (Anthony, R. P., and Brown, D. T., 1990, J. Virol.
(18) The measured relative dimensions of the different heads fit best the relative dimensions predicted by a quasi-icosahedral model in which the smallest T4 head corresponds to an icosahedron with a triangulation number T = 21.
(19) These phages contain 2-DNA, their head is a regular icosahedron, the tail consisting of a helix of protein subunits is attached to the head by a narrowed segment and is fixed in it by means of a disc-like structure.
(20) This can be explained in terms of icosahedron and cuboctahedron type clusters deposited on the surface of the carbon layer.
Polyhedron
Definition:
(n.) A body or solid contained by many sides or planes.
(n.) A polyscope, or multiplying glass.
Example Sentences:
(1) These viruses are short-tailed polyhedrons resembling the SpV3 virus of Spiroplasma citri, and all have been shown to lyse at least one other strain of SRO.
(2) In the intact and elastase-treated cages, the clathrin extends from the vertices into the interior of the polyhedron and forms an inner shell of material.
(3) These observations were compared with the possible combinations of polygonal sections through various polyhedral models proposed by other workers and the five classical regular polyhedrons.
(4) The Voronoi polyhedron of a given S-phase cell nucleus is that polyhedron of minimal volume defined by planes all of which are perpendicular bisectors of the vectors extending from the given cell to all other S-phase cells in the tumor.
(5) The co-ordination polyhedron displays approximate 4m2 symmetry.
(6) A minimal data structure of the polyhedron is then proposed, which contains only topological informations, since no coordinates have been generated.
(7) We hypothesize that this distinct 9S form represents a major oligomeric subunit involved in assembly and disassembly of clathrin polyhedron coats in the living cell.
(8) Bioassays of the two pure virus variants in M. brassicae larvae have shown the LD50 values to be 4610 polyhedron inclusion bodies (pibs) for PfMNPV(A) and 5937 pibs for PfMNPV(B).
(9) Electron micrographs suggest that the eight subunits form a polyhedron of point symmetry D4, or 42.
(10) A suitable composition for the residual glass phase of bioactive glass-ceramics can be found approximately and controlled on the basis of calculation of a structural parameter Y, which in the simplified concept of the glass structure corresponds to the mean number of bridging oxygens per polyhedron in the glass lattice.
(11) The direct assay using 125I-labeled rabbit immunoglobulins could detect 0.2 microng of polyhedron protein, and the indirect method using 125I-labeled sheep antirabbit immunoglobulins could detect 0.05 microng of polyhedron protein.
(12) Morphologically, the virus is a rectilinear polyhedron 270 A in diameter, without a process.
(13) The biological function of zinc is governed by the composition of its tetrahedral coordination polyhedron in the metalloprotein, and each ligand group that coordinates to the metal ion does so with a well-defined stereochemical preference.
(14) Successive calvarial and craniofacial polyhedron expansion, as well as weight, showed considerable variability and interindividual variation throughout the observation period.
(15) A complementary DNA that encodes a bovine brain, calmodulin-sensitive (type I) adenylylcyclase has been inserted into the baculovirus genome under the control of the strong polyhedron promoter.
(16) The head of phi25 is a regular polyhedron measuring 75 nm in diameter.
(17) RV volume was calculated from the polyhedron created by the markers by decomposing the polyhedron into 24 tetrahedrons, each of whose volumes could be solved from the xyz-coordinates of markers.
(18) for the optimum approximation of experimentally obtained values of the output signal, the method of the changeable polyhedron was applied belonging to the optimalization numerical methods used in the regulation technics.
(19) The coordination polyhedron of catalytic zinc is usually dominated by histidine side chains.
(20) The weak NO3- inhibitor does not displace Wat263 from the metal coordination but occupies a fifth binding site changing the zinc coordination polyhedron into a slightly distorted trigonal bipyramid.