What's the difference between cell and heterocyst?
Cell
Definition:
(n.) A very small and close apartment, as in a prison or in a monastery or convent; the hut of a hermit.
(n.) A small religious house attached to a monastery or convent.
(n.) Any small cavity, or hollow place.
(n.) The space between the ribs of a vaulted roof.
(n.) Same as Cella.
(n.) A jar of vessel, or a division of a compound vessel, for holding the exciting fluid of a battery.
(n.) One of the minute elementary structures, of which the greater part of the various tissues and organs of animals and plants are composed.
(v. t.) To place or inclose in a cell.
Example Sentences:
(1) The variation in thickness of the LLFL may modulate the species causing damage to the cells below it.
(2) Similar experimental manipulation has yielded in vitro lines established from avian B-cell lymphomas expressing elevated levels of c-myc or v-rel.
(3) A spindle cell sarcoma appeared 20 months after implantation of a pellet of 3-methylcholanthrene in the denervated foreleg of an adult frog, Rana pipiens.
(4) The effect of insulin-like growth factor I (IGF-I) on growth of small cell lung cancer (SCLC) cell lines was studied.
(5) The patterns observed were: clusters of granules related to the cell membrane; positive staining localized to portions of the cell membrane, and, less commonly, the whole cell circumference.
(6) This study was undertaken to determine whether the survival of Hispanic patients with squamous cell carcinoma of the head and neck was different from that of Anglo-American patients.
(7) This suggested that the chemical effects produced by shock waves were either absent or attenuated in the cells, or were inherently less toxic than those of ionizing irradiation.
(8) Patients with papillary carcinoma with a good cell-mediated immune response occurred with much lower infiltration of the tumor boundary with lymphocyte whereas the follicular carcinoma less cell-mediated immunity was associated with dense lymphocytic infiltration, suggesting the biological relevance of lymphocytic infiltration may be different for the two histologic variants.
(9) The liver metastasis was produced by intrasplenic injection of the fluid containing of KATOIII in nude mouse and new cell line was established using the cells of metastatic site.
(10) Assessment of the likelihood of replication in humans has included in vitro exposure of human cells to the potential pesticidal agent.
(11) Herpesviruses such as EBV, HSV, and human herpes virus-6 (HHV-6) have a marked tropism for cells of the immune system and therefore infection by these viruses may result in alterations of immune functions, leading at times to a state of immunosuppression.
(12) Steady-state values of cell, glucose, and cellulase concentration oxygen tension, and outlet gas oxygen partial pressure were recorded.
(13) In contrast, resting cells of strain CHA750 produced five times less IAA in a buffer (pH 6.0) containing 1 mM-L-tryptophan than did resting cells of the wild-type, illustrating the major contribution of TSO to IAA synthesis under these conditions.
(14) Within the outflow tract wall, the labelled cells were enmeshed by strands of alcian blue-stained extracellular matrix.
(15) Neutrons induced a dose-dependent cytotoxicity and mutation frequency in the AL cells.
(16) After stimulation with lipopolysaccharide and calcium ionophore A23187, culture supernatants of clones c18A and c29A showed cytotoxic activity against human melanoma A375 Met-Mix and other cell lines which were resistant to the tumor necrosis factor, lymphotoxin and interleukin 1.
(17) We also show that proliferation of primary amnion cells is not dependent on a high c-fos expression, suggesting that the function of c-fos is more likely to be associated with other cellular functions in the differentiated amnion cell.
(18) The high amino acid levels in the cells suggest that these cells act as inter-organ transporters and reservoirs of amino acids, they have a different role in their handling and metabolism from those of mammals.
(19) We have investigated the effect of methimazole (MMI) on cell-mediated immunity and ascertained the mechanisms of immunosuppression produced by the drug.
(20) Apparently, the irradiation with visible light of a low intensity creates an additional proton gradient and thus stimulates a new replication and division cycle in the population of cells whose membranes do not have delta pH necessary for the initiation of these processes.
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.