(v. t.) The act by which anything is crossed; as, the crossing of the ocean.
(v. t.) The act of making the sign of the cross.
(v. t.) The act of interbreeding; a mixing of breeds.
(v. t.) Intersection, as of two paths or roads.
(v. t.) A place where anything (as a stream) is crossed; a paved walk across a street.
(v. t.) Contradiction; thwarting; obstruction.
Example Sentences:
(1) However, when cross-linked to anti-CD4 or anti-CD8 antibodies a markedly enhanced proliferation of the corresponding subpopulation is observed.
(2) The cross sectional area of the aortic lumen was gradually decreased while the length of the stenotic lesion gradually increased by using strips with different width.
(3) The quaternary structure of ribonucleotide reductase of Escherichia coli was investigated, with the use of purified B1 and B2 proteins and bifunctional cross-linking agents.
(4) Multiple overlapping thin 3D slab acquisition is presented as a magnitude contrast (time of flight) technique which combines advantages from multiple thin slice 2D and direct 3D volume acquisitions to obtain high-resolution cross-sectional images of vessel detail.
(5) The mobility on sodium dodecyl sulfate-polyacrylamide gel electrophoresis is anomalous since the undenatured, cross-linked proteins have the same Stokes radius as the native, uncross-linked alpha beta gamma heterotrimer.
(6) 10D1 mAb induced a substantial proliferation of peripheral blood T cells when cross-linked with goat anti-mouse Ig antibody.
(7) Mapping of the cross-link position between U2 and U6 RNAs is consistent with base-pairing between the 5' domain of U2 and the 3' end of U6 RNA.
(8) There was however no difference in the cross-sectional studies and no significant deleterious effect detected of tobacco use on forearm bone mineral content.
(9) Plasma for beta-endorphin assay was preincubated with sepharose-bound anti-beta-lipotropin to remove beta-lipotropin that cross-reacted with the beta-endorphin RIA.
(10) In crosses between inverted repeats, a single intrachromatid reciprocal exchange leads to inversion of the sequence between the crossover sites and recovery of both genes involved in the event.
(11) Further purification of ZAB by filtration through Sephadex G-100 gave a preparation (ZAB2) which contained the common antigen as shown by the cross-reactivity of anti-ZAB2 rat serum with seven stains of N. gonorrhoeae.
(12) On the other hand, as a cross-reference experiment, we developed a paper work test to do in the same way as on the VDT.
(13) No reversions to wild-type levels were observed in 555 heterozygous offspring of crosses between homozygous Campines and normals.
(14) No cross reactions were found between bluetongue and epizootic haemorrhagic disease of deer viruses.
(15) Seven patients were treated with combination chemotherapy, consisting of CHOP (cyclophosphamide, doxorubicin, vincristine, prednisone) or MOPP (chloromethine, vincristine, procarbazine, prednisone), in some cases followed by non-cross-resistant second line chemotherapy, if no complete response was attained.
(16) [125I]AaIT was shown to cross the midgut of Sarcophaga through a morphologically distinct segment of the midgut previously shown to be permeable to a cytotoxic, positively charged polypeptide of similar molecular weight.
(17) Blood was cross-matched preoperatively in 47.7% of patients and 90% of this blood was either not administered or given as a delayed nonurgent procedure.
(18) Conjugational recombination in Escherichia coli was investigated by monitoring synthesis of the lacZ+ product, beta-galactosidase, in crosses between lacZ mutants.
(19) Crossed immunoelectrophoresis and sucrose density gradient ultracentrifugation of the patient's plasma showed his prothrombin to be qualitatively indistinguishable from normal prothrombin by these techniques.
(20) Eighty micrograms of the topically active parasympatholytic drug ipratropium were applied intranasally four times daily in 20 adults with perennial rhinitis and severe watery rhinorrhoea in a double-blind controlled cross-over trial.
Cruciform
Definition:
(a.) Cross-shaped; (Bot.) having four parts arranged in the form of a cross.
Example Sentences:
(1) Synchronized cells (doubly arrested by serum starvation and aphidicolin) displayed a biphasic distribution of the number of cruciforms over the first 6 h after release from synchrony with maxima at 0 and 4 h after release.
(2) The results indicate that the optimal cruciform loop size is four bases, with loose 'breathing' at the first base pair at the top of the cruciform stem at 37 degrees C, and little or no opening of base pairs at the four-way junction.
(3) These sequences adopt cruciform geometry when the DNA helix is torsionally strained by negative supercoiling.
(4) Analysis of the products of the cruciform cleavage reaction by electrophoresis on polyacrylamide gels under denaturing conditions revealed that the cruciform structure was cleaved at either of two sites present in the stem of the cruciform and was not cleaved at the end of the stem.
(5) To determine whether the me3-psoralen might itself be disrupting cruciform structures, cruciforms were first produced in isolated Tetrahymena rDNA by heat treatment and then crosslinked in vitro.
(6) The other inconstant supports of the digital sheaths are systematically recorded indeed (C1 to C3), but only in exceptional cases they exist of cruciform fibers (Lig.
(7) We conclude that transcriptionally driven negative supercoiling provokes cruciform formation in vivo.
(8) These and other data implicate a linear rather than a cruciform conformation of the oriS palindrome in the initiation of HSV replication.
(9) Nonenzymatic glycosylation resulted in formation of cross-links and alterations of the cruciform shape of laminin molecules; these alterations were dramatic when high concentrations of glucose were used.
(10) A cruciform structure occurring at the pT181 replication origin in vitro is greatly enhanced by the binding of the plasmid-encoded initiator protein RepC.
(11) The C. fasciculata bent helix is neither cleaved by S1 nuclease nor modified by bromoacetaldehyde under conditions in which other unusual DNA structures (such as cruciforms or B-Z junctions) are susceptible to attack by these reagents.
(12) A plasmid encoding the gene for a temperature-sensitive Eco RI methylase (MEco RI) was cotransformed with different plasmids containing inserts that had varying capacities to form left-handed helices or cruciforms with a target Eco RI site in the center or at the ends of the inserts.
(13) We infer that RecBCD enzyme molecules must enter the termini of duplex DNA and approach the cruciform from more than one direction in order to cleave it into recombinant products.
(14) The cruciform cleavage enzyme was able to cleave the Holliday junction present in bacteriophage G4 figure-8 molecules.
(15) The B-Z junction is preferentially protected as compared to the cruciform, which in turn is more protected than other minor S1-sensitive structures present in pPst-0.9.
(16) We found that in both cases, induction of transcription by IPTG leads to the transition of the d(A-T)16 stretch into a cruciform state.
(17) High resolution mapping experiments reveal that Rh(DIP)3(3+) cleaves at a specific AT-rich site neighboring the stem of the minor cruciform on pBR322.
(18) Transcription itself has been shown to induce supercoiling, but the requisite negative supercoiling for cruciform extrusion by (AT)n in oocytes was not generated in this way since the characteristic P1 cutting pattern was retained even when RNA polymerase elongation was blocked with alpha-amanitin.
(19) The repeat units of the three minor variants are defined by identical 14-bp G + C-rich inverted repeats that might form cruciforms.
(20) Open regions and cruciform structures are also allowed for in the model.