(1) F pili could be seen on cells of the latter strain but not on those of the parental strain or the strain bearing pColVF54 luminal diameter r. Pili other than F pili were not seen on cells of the strains bearing pF54 in either form.
(2) The pili of the three serotypes had similar densities and were morphologically similar by electron microscopy.
(3) Ultrastructural studies of Aeromonas hydrophila strain AH26 revealed two distinctive pilus types: "straight" pili appear as brittle, rod-like filaments, whereas "flexible" pili are supple and curvilinear.
(4) P pili mediate the binding of uropathogenic E. coli to a digalactoside receptor determinant present in the urinary tract epithelium.
(5) Uropathogenic Escherichia coli adhere to uroepithelial cells by their digalactoside alpha-D-galactopyranosyl-(1----4)-beta-D-galactopyranose [alpha-D-Galp-(1----4)-beta-D-Galp or Gal alpha (1----4)Gal]-binding pili, which are composed of repeating identical subunits.
(6) Type I pili increased in length much more slowly than did F pili, although the fraction of cells having visible type I pili increased very rapidly after blending because of the large number of type I pili per cell.
(7) A gonococcal pili antigen preparation was used to detect antibody activity sera obtained from 322 culture-positive asymptomatic females and 150 negative controls.
(8) The antigenic surface-associated colonization factor of E. coli strain H-10407 has been further characterized: this pilus-like antigen is produced under conditions of growth that repress the production of common pili of E. coli.
(9) Antigenic variation of gonococcal pili results from the unidirectional transfer of genetic information from variant-encoding partial pilin genes to an active expression locus.
(10) Both motility and the production of pili are transient when initiated in this way.
(11) We also found that the antigens distributed in arrector pili muscles and the walls of muscular vessels were obviously related to the unmyelinated nerve fibers innervating the smooth muscle cells.
(12) The pili of S7 were morphologically, electrophoretically, and immunologically (as far as polyclonal antibody was used) indistinguishable from the 16-kilodalton pili of V. cholerae O1 strain 82P7.
(13) Although pili can form without PapF and PapG, such pili are unable to bind to the digalactoside.
(14) The ability of Typhimurium to adhere to and invade epithelial cells has been associated with flagella, pili of type I and mannose-resistant haemagglutinating activity.
(15) Electron microscopy of negatively stained bacteria was carried out to visualize pili.
(16) Sodium cyanide, azide, and iodoacetate also apparently inhibit f2 adsorption to cells but not to detached F pili.
(17) In course of in vitro passages up to 10. subculture morphological changes of the pili have been observed.
(18) Subunit (pilin) of the purified pili has a molecular weight of about 16,000.
(19) K99+, 987P+, and type 1 pilus+ bacteria could be prevented from adhering to epithelial cells by Fab fragments specific for K99, 987P, or type 1 pili, respectively.
(20) The use of low accelerating voltages and conductive staining procedures allowed us to obtain images of colonization factor antigen I pili and other structural details which were obscured by conventional gold-coating techniques.
Poly
Definition:
(n.) A whitish woolly plant (Teucrium Polium) of the order Labiatae, found throughout the Mediterranean region. The name, with sundry prefixes, is sometimes given to other related species of the same genus.
Example Sentences:
(1) Only the approximately 2.7 kb mRNA species was visualized in Northern blots of total cellular and poly(A+) RNA isolated from cardiac ventricular muscle.
(2) While both inhibitors caused thermosensitization, they did not affect the time scale for the development of thermotolerance at 42 degrees C or after acute heating at 45 degrees C. The inhibitors of poly(ADP-ribosylation) radiosensitizers and thermosensitizers may be of use in the treatment of cancer using a combined modality of radiation and hyperthermia.
(3) Poly (8NH2G) does not interact with poly(C) in neutral solution because of the high stability of the hemiprotonated G-G self-structure.
(4) Polyadenylic-polyuridylic acid complexes (poly A:U) at the 1-5 mu g level, were mitogenic for spleen cells when given intravenously to normal Balb or cortisone-treated mice.
(5) Analysis of glutamate dehydrogenase (GDH) expression by enzyme assay and immunoblots, as well as Northern and dot blots of poly (A)+ RNA, in the deletion strains indicates that there are two upstream regulatory sequences that control the level of gene expression.
(6) F(ab')2 anti-Ig stimulates the rapid breakdown of inositol phospholipids in B cells, resulting in the prolonged release of inositol (poly)phosphates and diacylglycerol.
(7) Newly synthesized poly(A) associated mRNA with S value of 25 and a stimulation of poly(A) lacking mRNA of 8--9 S and 16--17 S were found in the CA3 nerve cells of trained but not in active controls.
(8) The mutant ribosomes prepared from the transition-phase cells have much lower activity (below 60%) for poly(U)-directed polyphenylalanine synthesis than those in exponentially growing or resting stationary-phase cells.
(9) Previous studies demonstrated that, when poly(dT).oligo(dA) was used as a template-primer, both proteins were required for poly(dA) synthesis.
(10) Sequences representing the entire TIR are transcribed into poly(A)+ mRNA at both early and late times in the infection.
(11) The poly(dG-dC) helical duplex forms a modified, B-family structure (B*) at very high hydration and a normal B structure at slightly lower hydration.
(12) After size fractionation on a sucrose density gradient, poly(A)+ RNA encoding for the MDCK taurine transporter was found in the fraction whose average size was 4.4 kilobases.
(13) Poly(ortho ester) bioerodible polymers are suitable materials for the topical administration of a wide variety of therapeutic agents; varying the nature and amounts of excipients physically incorporated into the polymer will vary the erosion rates from a few hours to many months.
(14) alpha 1 and alpha 2 were very similar as DNA polymerases in their sensitivity to several inhibitors and their preference for template-primers, except that alpha 1 had a slightly greater preference for poly (dT) X (rA)10 than alpha 2 did.
(15) The cells, however, were not inhibited by the same concentrations of free poly(Lys) and free drug.
(16) The product AEDANS-S1 can bind to 30S ribosomal subunits lacking S1 as shown by polyacrylamide-agarose gel electrophoresis AEDANS-S1 and AAF-S1 when added back to S1-depleted 30S subunits modulate poly(U)-dependent polyphenylalanine synthesis in the presence of IF3 in a very similar way to unmodified S1.
(17) Both early and late after infection, total nuclear viral transcripts are, on the average, larger than viral transcripts found on polyribosomes; however, nuclear HSV poly(A+) RNA is not measureably larger than the corresponding cytoplasmic viral poly(A+) sequences at either time.
(18) The "random coil" conformational problem is examined by comparison of vibrational CD (VCD) spectra of various polypeptide model systems with that of proline oligomers [(Pro)n] and poly(L-proline).
(19) Infrared linear dichroism investigations indicate that the alternating poly[d(A-T)]-poly[d(A-T)], enzymatically synthesized, adopts a lower humidity a well-expressed A* form in which stability is relatively small,i.e., restricted to limited relative humidity.
(20) The bent DNA has been localized to a 40-55 base pair (bp) segment and contains six (A)3-5 stretches (that is, six poly(A) stretches, three to five nucleotides in length) phased approximately every 10.5 bp.