What's the difference between filamentous and heterocyst?
Filamentous
Definition:
(a.) Like a thread; consisting of threads or filaments.
Example Sentences:
(1) Conditions consistent with a buildup of reduced flavoprotein, however, favored filament formation.
(2) Suspensions of isolated insect flight muscle thick filaments were embedded in layers of vitreous ice and visualized in the electron microscope under liquid nitrogen conditions.
(3) Ordering of these filaments into a parallel array is the basis of birefringence in the A region, and loss of birefringence is therefore a measure of decreased order.
(4) Structural studies indicate that caveolae are decorated on their cytoplasmic surface by a unique array of filaments or strands that form striated coatings.
(5) Accumulations of filaments in the axons and in the perineural cells were accompanied by Rosenthal fibres.
(6) Electron microscopic examination of all leptomeningeal and meningioma cultures revealed desmosomes and dense tonofilament formation; in addition, granular, filamentous basement membrane-like material was abundant in the extracellular spaces of all cultures.
(7) A new method of staining the keratin filament matrix allowing a visualization of the filaments in cross section of hair fibres has been developed.
(8) These force-generators are identified with projections (cross-bridges) on the thick filament, each consisting of part of a myosin molecule.
(9) In smooth muscles there is no organized sarcomere structure wherein the relative movement of myosin filaments and actin filaments has been documented during contraction.
(10) The results indicate that synthesis of lamellar bodies depends on an intact microtubular system, whereas secretion requires actin filaments in a functional state.
(11) The latter reaction is linked to a conformation change of the actin subunit that causes a destabilization of the actin-actin interactions in the filament, i.e., a structural change of the filament.
(12) In the capsule of the fibrocartilage cells, parallel orientated filaments exhibit a periodical arrangement.
(13) The images of 56 tubular myosin filaments of the fleshfly and 62 filaments of the housefly were digitized and computer processed by rotational averaging.
(14) It does not appear to react with the anti-IFA antibody, suggesting that it is not a member of the intermediate filament class of proteins.
(15) This suggests that cytokeratin 14 acts as an indiscriminate type I cytokeratin in filament formation in the established cell lines.
(16) Gene II protein is required for all phases of filamentous phage DNA synthesis other than the conversion of the infecting single strand to the parental double-stranded molecule.
(17) This supports the view that the pH is of no major importance for filamentation in vivo.
(18) Ultrastructural examination of a tumor with a typical cribriform pattern showed spaces of two types; the more frequent type was bounded by cells with straight plasma membranes and contained filamentous and basement-membrane-like material, and the less frequent type was surrounded by cells with numerous microvilli and contained nonfilamentous homogeneous material.
(19) The bright lines in the difference image represent the paths along which the filaments have moved and are measured using a crosshair cursor controlled by the mouse.
(20) Astrocytes showed a transitional swelling, later followed by an accumulation of glycogen and filaments.
Heterocyst
Definition:
(n.) A cell larger than the others, and of different appearance, occurring in certain algae related to nostoc.
Example Sentences:
(1) We have isolated a mutant Anabaena strain that develops heterocysts mostly at the ends of filaments.
(2) In the third type of mutants, paired proheterocyst differentiation occurred at regular intervals in long filaments and these were defective in their further development into mature heterocysts.
(3) Much of the label entering heterocysts was not available for diffusional exchange back into vegetative cells.
(4) Heterocysts and vegetative cells of the filamentous nitrogen-fixing Anabaena azollae isolated from the apex to the basal leaf cavities of Azolla filiculoides were examined by epifluorescent microscope after fluorochrome staining.
(5) In one, hybridization of heterocyst RNA to a null DNA probe (DNA not transcribed in vegetative cells) revealed that heterocyst-specific transcripts were encoded by 25% of the DNA sense strand, representing approximately 1,000 genes (assuming each to be 1,500 nucleotides in length).
(6) Vegetative cells and young heterocysts in fructose-supplemented medium were significantly larger, were filled with glycogen granules, and had fewer thylakoids.
(7) The quantities of these pigments, however, increase with age of cultures, and by the end of 5 days the majority of heterocysts contain comparatively large amounts.
(8) Transcription and DNA rearrangement of the nifHDK operon both occur late during heterocyst differentiation, about 18 to 24 h after induction, suggesting that the regulation of these events might be coupled.
(9) This study presents the effects of Cr, Pb, Ni and Ag on growth, pigments, protein, DNA, RNA, heterocyst frequency, uptake of NH4+ and NO3-, loss of electrolytes (Na+ and K+), nitrate reductase and glutamine synthetase activities of Nostoc muscorum.
(10) The carbohydrate moieties of the heterocyst wall and spore wall are similar in that the ratio of glucose, mannose, galactose, and xylose is approximately 75:20:3:4 in both walls.
(11) 111:1-61, 1979) (sections II [pleurocapsalean], IV [heterocystous, filamentous, nonbranching], and V [heterocystous, filamentous, branching]) are phylogenetically coherent.
(12) The restriction map of this region of the chromosome showed that the rearrangement was the deletion of a 55-kb DNA element from the heterocyst chromosome.
(13) We have separated vegetative cells from heterocysts in differentiated filaments of Nostoc muscorum, and analyzed their proteins by polyacrylamide-gel electrophoresis.
(14) The remaining 900 to 1,300 transcripts present in the heterocyst appeared to be constitutively produced in both vegetative cells and heterocysts.
(15) Twelve amino acid analogs and related compounds were screened for their ability to induce heterocysts in ammonia-repressed, undifferential filaments of Anabaena variabilis.
(16) The [2Fe-2S] ferredoxin produced in the heterocyst cells of Anabaena 7120 plays a key role in nitrogen fixation, where it serves as an electron acceptor from various sources and an electron donor to nitrogenase.
(17) A correlation was not observed between the level of GS expression and the extent of symbiotic heterocyst differentiation in Nostoc sp.
(18) The other class exhibits an altered heterocyst spacing pattern.
(19) Mutants with decreased heterocyst frequency due to defective differentiation and development showed less growth and nitrogen fixation in nitrogen-free medium than the parent alga.
(20) Cyanobacteria require boron for formation of nitrogen-fixing heterocysts and boron may be beneficial to animals.