(a.) Having two plane faces; as, the dihedral summit of a crystal.
Example Sentences:
(1) These variants, which yielded a robust illusion, included dihedral angles in place of the arrowheads of the classical pattern.
(2) Time histories of the dihedral angles and residue-residue cross-strand distances are used to study the behavior of the sheet structure.
(3) Comparison of the geometry of the engineered disulfide with those of naturally observed disulfides in proteins shows that the engineered bridge adopts a left-handed spiral conformation with a typical set of dihedral angles and C alpha-C alpha distance.
(4) Via Karplus-type equations, they are transformed into dihedral angles and a good agreement is found, allowing for a determination of the phi angle with a certain range of degrees.
(5) A combination of two procedures was used to search the conformational space for fentanyl, which included nested dihedral scans, geometry optimization and molecular dynamics simulation at different temperatures.
(6) The results of high resolution 1H and 13C NMR using dimethylsulfoxide and 2H2O as solvents, combined with a new method for determining dihedral angles phi and psi from 13C and 1H spin lattice relaxation times are presented.
(7) A total of 1244 experimental constraints were used, including 1120 distance constraints, 103 dihedral angle constraints and 21 hydrogen bond constraints.
(8) We have developed a method to obtain the dihedral angles for a low-energy structure of a protein, starting with the X-ray structure; it is applied here to examine the degree of flexibility of bovine pancreatic trypsin inhibitor.
(9) Interproton distances were derived from crosspeak volumes in two dimensional Nuclear Overhauser Effect spectra, and dihedral angles were calculated from appropriate coupling constants.
(10) The orientation of the N-phenyl group with respect to the N-acyl moiety is essentially invariant with an approximately 90 degrees dihedral angle.
(11) The solution structures were calculated using 409 distance and 73 dihedral angle restraints.
(12) On the basis of the conformational energy (delta E, difference from the most stable conformational energy), which is calculated as a function of the dihedral angle (theta) between the two phenyl rings, biphenyl congeners can be classified into four groups with different conformations.
(13) A hydrated cobalt ion is found to coordinate to two N7 atoms of adjacent guanines, forcing these two guanines to destack with a large dihedral angle (32 degrees), in the dimer of the tetragonal form.
(14) The dihedral angle between the two benzenoid rings measures 1.4(1) degrees.
(15) The solution structure of insectotoxin 15A (35 residues) from scorpion Buthus eupeus was determined on the basis of 386 interproton distance restraints 12 hydrogen-bonding restraints and 113 dihedral angle restraints derived from 1H NMR experiments.
(16) It is concluded that weak attractive interactions between CH groups and S atoms are capable of stabilizing rotamers with unusually low (about 30 degrees) values of the SS-CC dihedral angle.
(17) beta-Breakers can be located automatically using a consensus approach based on algorithmic secondary structure assignment, solvent accessibility and backbone dihedral angles.
(18) It is shown that the dihedral angle omega of the Man alpha 1-6Man beta linkage exhibits low flexibility with a preference for the omega = 180 degrees conformation when residue D2 is present and high flexibility when this residue is absent.
(19) The majority of paperclips are shown to have tightly clustered sets of main-chain dihedral angles.
(20) Measurements on model compounds have been used to characterise a Karplus-type relationship between 3JCOCH and dihedral angles in sugar.
Polyhedral
Definition:
(a.) Alt. of Polyhedrical
Example Sentences:
(1) The polyhedral matrix, which in nature encapsulates the virions, is, in turn, composed mainly of two polypeptide species with molecular weights of about 30,000 and 20,000, and several minor proteins.
(2) SVC3 is a short-tailed polyhedral virus particle morphologically detectable in many spiroplasmas.
(3) Western blot analysis and immunofluorescent microscopy of polyhedra solubilized under various conditions indicated that p32 is associated with the polyhedral envelope.
(4) Antiserum against the polyhedral protein immunoprecipitated "non-structural" proteins and the polyhedral protein, but not virus particle structural proteins.
(5) The tumor showed a lobulated surface lined by squamous cell layer, and had epithelioid and polyhedral cells forming alveolar clusters.
(6) One is a polyhedral agent which was observed as early as 24 hr after infection in the perinuclear cytoplasm.
(7) The present paper on the perilimbal zone of the guinea pig conjunctival epithelium describes the ultrastructural organization of the basal cell layer, including basal epithelial cells, melanocytes and small lymphocytes, as well as the intermediate cell layers consisting of polyhedral cells and processes from the melanocytes and the small lymphocytes.
(8) The polyhedral liver cell faces the Space of Disse (vascular pole) or faces an adjacent hepatocyte (biliary pole).
(9) Glial fibrillary acid protein stained in occasional myoepithelial cells in normal gland and polyhedral stromal cells in benign mixed tumor.
(10) Four types of trophoblast cells are seen in mouse ectoplacental cone on day 8 of the pregnancy: (1) trophoblast-1 at the base of the cone are polyhedral, compactly arranged and contain large nucleoli, (2) trophoblast-2 in the middle of the cone enclose several heterolysosomes, erythro-and leucophagosomes, (3) trophoblast-3, also in the middle, have several membrane-bound osmiophilic granules, (4) trophoblast-4 at the periphery of the cone are oblong and enclose many pleomorphic bodies.
(11) It is the result of either a casting-off of the semilunar ganglion cells into the cavernous sinus or a transformation of several cells into polyhedral cells with an epithelial-like organization, a process which immediately precedes their further degeneration.
(12) Thymocytes isolated in suspension and those in postcapillary venules of thymus did not show the polyhedral shape characteristic of the cells in thymic tissue.
(13) Invasive melanomas measuring less than 0.8 mm in thickness tend not to be associated with metastases; the tumor cells may be small polyhedral (in which case confusion with a compound nevus often arises), epithelioid, spindled, or ballooned.
(14) Melanocytomas are pigmented tumors of the uvea and optic nerve head composed of plump polyhedral melanocytes which have been regarded as nevus cells.
(15) The more common were polyhedral with poorly arranged fibrils in the cytoplasm and an abundant fuzzy coat.
(16) The second type of agent appears to be a typical polyhedral virus, seen only in the cytoplasm and also resulting in lysis of the cell.
(17) The phage particle consists of a polyhedral head, 65 nm in diameter, and a long flexible tail 210 nm long and 10 nm wide with helically arranged subunits.
(18) They were seen to consist of uniform sized particles having a polyhedral head, 57 nm by 61 nm, and a short tail, 25 nm long, joined to the head at one vertex by a collar.
(19) 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.
(20) The tumor cells were uniform in appearance, plump and polyhedral, with distinct finely granular eosinophilic cytoplasm, and were arranged in solid acinar groups.