(a.) Having eight faces or sides; of, pertaining to, or formed in, octahedrons; as, octahedral cleavage.
Example Sentences:
(1) As a prerequisite for preparing bispecific antibody conjugates containing anti-tumor and anti-metal chelate binding sites that can be used for pretargeted immunoscintigraphy, monoclonal antibodies (Mabs) have been raised against an octahedral metal chelate synthetized from gallium (Ga) and the hexadentate ligand N,N'bis[2-hydroxy 5-(ethylene beta carboxy) benzyl] ethylenediamine N,N' diacetic acid (Ga-HBED-CC).
(2) Circular dichroic (CD) and magnetic CD spectra indicate that the first Co2+ binding site is tetrahedral-like and that the second is octahedral-like.
(3) The bonding sites are ascertained, and the complexes were all six-coordinate assuming a distorted octahedral geometry.
(4) The electronic spectra confirms the octahedral structure of the complexes.
(5) Ca1 is in near-ideal pentagonal bipyramidal configuration with Asp200 carboxylate and Pro175 peptide C = O in an apical, and Val177 peptide C = O and four water molecules in an equatorial position, whereas Ca2 displays incomplete octahedral coordination with the carboxylate of Asp260, the peptide C = O of Val16 and the two water molecules.
(6) This change in protein conformation both exposes a cryptic protein pocket on each subunit to which phenol binds and forces the HisB10 zinc sites to undergo a change in coordination geometry from octahedral to tetrahedral [Derewenda, U., Derewenda, Z., Dodson, E. J., Dodson, G. G., Reynolds, C. D., Smith, G. D., Sparks, C., & Swensen, D. (1989) Nature 338, 593-596].
(7) Metal site 1 is four-coordinated and tetrahedral in the absence of substrate and is six-coordinated and octahedral in its presence; the O2 and O4 atoms of linear inhibitors and substrate bind to metal 1.
(8) The structural study reveals an asymmetric pseudo-octahedral N3O3 metal coordination sphere with meridional stereochemistry.
(9) The enzyme was crystallized to single octahedral bipyramids with sizes up to 500 x 200 x 150 microns 3.
(10) The X-ray structure of staphylococcal nuclease suggests octahedral coordination of the essential Ca2+, with Asp-21, Asp-40, and Thr-41 of the enzyme providing three of the six ligands [Cotton, F. A., Hazen, E. E., Jr., & Legg, M. J.
(11) An X-ray study of the crystal structure of a cobalt(II) complex with uridine 5'-monophosphate shows it to contain polymeric chains of composition [Co2(H2O)4 (5'-UMP)2]n. The cobalt atoms do not bind to the pyrimidine base moiety; instead each metal atom is octahedrally coordinated to four phosphate groups and two water molecules.
(12) Furthermore, we sought to clarify how these experimental results relate to our theory for skeletal morphogenesis which postulates that endochondral ossification is accelerated in regions of octahedral shear (deviatoric) stress and inhibited in areas of compressive hydrostatic (dilatational) stress.
(13) Each of the two inequivalent copper ions is coordinated by six water-molecule O atoms in a significantly distorted octahedral arrangement.
(14) Addition of magnesium changes the spectral characteristics of the apoenzyme reconstituted with 2 g-atom of cobalt from predominantly octahedral to 4- or 5-coordinate geometry.
(15) The coordination geometry at the ruthenium atom is distorted octahedral.
(16) Each Ru ion is coordinated in a distorted octahedral fashion by five ammonia molecules and a chloride ion.
(17) The geometry is difficult to classify but might best be described as distorted octahedral.
(18) The glycyl carbonyls from each of the peptides are octahedrally coordinated to the cation with an average calcium oxygen coordination distance of 2.26A.
(19) On the basis of these studies, a highly distorted, high-spin, chloro-bridged, polymeric octahedral structure for [Mn(N-N-S)Cl2]; a distorted, low-spin, monomeric octahedral structure for [Fe(N-N-S)2]; a distorted, high-spin, octahedral structure for [Ni(N-N-S)2]; and a square-planar structure for [M(N-N-S)X] (M = Ni, Cu, Pt or Zn and X = Cl- or -OAc) are suggested.
(20) Mass measurements from cryoelectron micrographs and image analysis of negatively stained specimens established that a distinctive 320-A-diameter particle consists of 24 close-packed pentamers arranged with octahedral symmetry.
Octahedron
Definition:
(n.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.
Example Sentences:
(1) The structure of the activated forms of CF1 can be described best as an intermediate between the dimeric arrangement of latent CF1 and an octahedron.
(2) Location and refinement of the two inequivalent H atoms permitted a detailed analysis of the hydrogen bonding, which occurs principally between the oxygen octahedron and the bromate groups.
(3) The room-temperature structure is very similar to that reported previously for a sample at 169 K. The water O atoms form a very slightly distorted octahedron about nickel while the perbromate-ion geometry is virtually regular tetrahedral.
(4) The central molybdenum atom adopts a distorted octahedral coordination geometry with one face of the octahedron occupied by the tridentate pyrazolylborate ligand and the opposite face by the oxo and the two phenolato ligands.
(5) The coordination environment of the Mg atom is a very nearly regular octahedron of water O atoms.
(6) The quaternary structure of the protein molecule is approximated by a model consisting of six spherical subunits situated at the vertices of an octahedron having the symmetry 32.
(7) The single type of Al ion is coordinated by six inequivalent water O atoms which form a slightly distorted octahedron.
(8) Scanning electron microscopy was employed to elucidate the structure of the crystals, which were found to exist as regular octahedrons ranging in size from 5 to 90 micrometers.
(9) The different spectral forms result from the extent of distortion of the MnIV octahedron.
(10) By computer calculation with the use of atom-atom potentials a stereochemical model of the DNA-hydrate Na+ complex was obtained according to which the Na+(H2O)6 octahedrons are localized in the narrow groove of DNA with formation of a great number of van der vaals contacts and hydrogen bonds.
(11) In the case of artificially produced conjugate containing six cross-linked CT molecules, this is observed at Wo = 43 when rc is equal to the radius of the sphere surrounding the absolute octahedron composed of six CT globules.
(12) In one simulation, one alpha-cyclodextrin form in a "truncated octahedron box" containing 611 water molecules is simulated over 90 picoseconds to mimic the solution structure.
(13) The average Al--O distance within the octahedron is 1.872 (11) A.