(1) The ability of TSH to regulate each in an antiparallel manner is atypical.
(2) The first contains only antiparallel beta-segments, the second "mixed" beta-segments, with some strands lying antiparallel and others parallel.
(3) Important secondary structure elements that can be derived from the observed nuclear Overhauser effects are a large antiparallel beta-pleated sheet consisting of four strands, A, B, C, D, a segment SAB consisting of an extended region around the active-center histidine (His-15) and an alpha-helix, a half-turn between strands B and C, a segment SCD which shows no typical secondary structure, and the alpha-helical, C-terminal segment S(term).
(4) There is a further possibility of formation of an antiparallel sheet structure between the insulin and receptor molecules in the complex similar to that between monomers in the insulin dimer.
(5) The refined structures are comprised of a C-terminal alpha-helix, a small segment of antiparallel beta-sheet, and several loops.
(6) This was ascribed to the formation of a triple helix involving two 1,10-phenanthroline-octathymidylate strands that adopt an antiparallel orientation with respect to each other.
(7) In both the light- and heavy-chain variable domains, the stereochemistry of five structurally conserved sites general to all known antibody structures matched that of the zinc ligands of carbonic anhydrase: three residues on two hydrogen-bonded antiparallel beta-strands.
(8) The theory is developed for intramolecular beta-structure, but it can also explain the overall features of intermolecular beta-folding; it is applicable both to antiparallel and parallel beta-sheets.
(9) Monomer-monomer contacts involve antiparallel beta-sheet interactions, which form a dimer with two layers of eight beta-strands.
(10) Common features of the solution structure and the two crystal structures are the four-stranded beta-structure, composed of a pair of parallel strands, and three pairs of antiparallel beta-strands flanked on one side by a 12-residue alpha-helix and on the other side by a loop containing the serine proteinase binding site.
(11) The dimers are predominantly antiparallel and nearly in register, as judged by antibody labeling.
(12) The regular secondary structure includes two and a half turns of alpha-helix running from residues 21 to 30 and a three-stranded antiparallel beta-sheet including peptides 3-5, 34-38, and 41-46.
(13) On the basis of the secondary structure calculations from the known amino acid sequence we came to the conclusion that hepatitis A virus capsid proteins have the typical antiparallel beta-sheet bilayer structure.
(14) Each domain is composed of two motifs with the 'Greek key' topology which form a pair of four-stranded beta-sheets with an antiparallel packing.
(15) A novel 282-residue extension contains repeats of approximately 29 amino acid residues predicted to have an antiparallel beta-sheet structure, followed by a glycine-rich sequence.
(16) The polypeptide crystallizes from ethanol as a left-handed, double-stranded, antiparallel beta 5.6-helical dimer that is 31 A long and an average of 4.8 A in diameter.
(17) As shown in a companion paper (Rippe et al., 1989), the two combinations D1.D3 and D2.D4 form normal antiparallel duplexes, whereas the pairs D1.D2 and D3.D4 constitute duplexes with the same sequences, but with the two strands parallel to each other.
(18) Contrary to assertions by Makinen & Sigountos (1984), our results unambigously demonstrate that adjacent rows of double strands in macrofibers are oriented in an antiparallel manner, as in the Wishner-Love crystal.
(19) Oxidized glutaredoxin contains a four-stranded beta-sheet, with the peripheral strand 32-37 arranged parallel to the strand 2-7, which further combines with the two additional strands 61-64 and 67-69 in an antiparallel fashion.
(20) By overlapping two photographic transparencies of the polar paracrystal antiparallel, directly observed images of polymorphic bipolar paracrystals could be synthesized photographically with fidelity.
Vector
Definition:
(n.) Same as Radius vector.
(n.) A directed quantity, as a straight line, a force, or a velocity. Vectors are said to be equal when their directions are the same their magnitudes equal. Cf. Scalar.
Example Sentences:
(1) The dependence of fluorescence polarization of stained nerve fibres on the angle between the fibre axis and electrical vector of exciting light (azimuth characteristics) has been considered.
(2) A beta-adrenergic receptor cDNA cloned into a eukaryotic expression vector reliably induces high levels of beta-adrenergic receptor expression in 2-12% of COS cell colonies transfected with this plasmid after experimental conditions are optimized.
(3) We have constructed retroviral vectors derived from the genome of avian erythroblastosis virus ES4 (AEV ES4).
(4) The 6.6-kb DNA Bam HI fragment containing the resistance gene was cloned with the plasmid vector pIJ699.
(5) The plasmid pMucAMucB, constructed from the Haemophilus influenzae vector pDM2, and a similar plasmid, constructed from pBR322, increased the survival after UV irradiation of Escherichia coli AB1157 with the umu-36 mutation and also caused UV-induced mutation in the E. coli strain.
(6) In assessing damaged nets and curtains it must be recognised that anything less than the best vector control may have no appreciable impact on holoendemic malaria.
(7) When an expression vector containing plasminogen cDNA is transfected into baby hamster kidney cells, the number of drug-resistant colonies as well as the levels of plasminogen secreted by those colonies is lower than observed in similar transfections of other protease precursor genes.
(8) The vector is relatively small (6 kilobase pairs) and contains a portion of the L. seymouri alpha-tubulin gene positioned in-frame with a truncated neomycin phosphotransferase gene that confers resistance to the aminoglycoside G418.
(9) The presence of potential insect vectors and the occurrence of clinical signs are indications of active transmissions.
(10) Subcloning of pLR beta 118 into a transcription vector with subsequent in vitro transcription and translation using the reticulocyte lysate system in the presence of microsomes followed by immunoprecipitation with mAb OX6 and two-dimensional gel electrophoresis revealed the intact RT1.B beta I-chain.
(11) It is the most commonly reported vector-borne disease in the United States, where the incidence is highest in the eastern and midwestern states.
(12) The primary focus of the government at this point is vector control,” said Nadal.
(13) Transfer of the shuttle vectors from B. uniformis donors to E. coli occurred at the same frequencies when the matings were done aerobically or anaerobically.
(14) Discovery of this vectorhost-parasite system in the Americas, and the localization of promastigote flagellates (leptomonads) in the hindgut of the vector, should assist in clarifying interpretative problems associated with infection of wild-caught flies in studies on leishmaniasis in the Americas and elsewhere.
(15) ELISA, cDNA dot blot hybridization and transmission by vector aphids were used to investigate the occurrence and degree of cross-protection produced in oat plants by virus isolates representing five strains or serotypes of barley yellow dwarf virus, namely PAV, MAV, SGV, RPV and RMV.
(16) The results suggests that abrin B chain of chimeric protein may act as a vector to carry ACTI into the tumor cells.
(17) The peak biting activity of the vector and peak appearance of microfilariae in the peripheral blood occurred at about 01.00 h, which accounts for the optimum infection of the vector population.
(18) The transposon-containing plasmids were used to localize essential replication functions and to characterize the stability of large inserts in these vectors.
(19) A recombinant gene encoding human growth hormone (hGH) was stably introduced into cultured myoblasts with a retroviral vector.
(20) While it has been possible to readily produce large numbers of such templates from M13 or other single-stranded vectors for several years, the sequencing of double-stranded DNA templates using the ABI 373 DNA Sequencer has had a considerably lower success rate.