(n.) A rhizopod. common in fresh water, capable of undergoing many changes of form at will. See Rhizopoda.
Example Sentences:
(1) An unprincipled coward with the backbone of an amoeba."
(2) Developing D. discoideum amoebae synthesize and secrete cAMP following the binding of cAMP to their surface cAMP receptor, a response called cAMP signaling.
(3) The relative amount of the crystals was measured in both amoeba strains on the basis of the integral extinction value.
(4) In amoeba cells the enzyme, like exo N-acetylglucosaminidase and acid phosphatase, is attached to the lysosomes, as it is sedimentable when homogenates are prepared in medium containing sucrose.
(5) Recent reports incriminating Acanthamoeba, a small free-living amoeba, wide-spread in environmental soils and waters, in acanthamoebic keratitis cases wearing soft contact lenses, drew attention to cleaning solutions for contact lenses.
(6) The amoeba, however, could not use yeasts, molds, or a green alga as a nutritional source.
(7) The drinking water was tested in chemical and bacteriological respects as well as on amoebas and rotaviruses.
(8) A new amoeba, isolated from well water in Gambia, West Africa, is described and named Phreatamoeba balamuthi n. g., n. sp.
(9) It was found that the uptake of this cation by the amoebae was fast in both species, conditions that modify the membrane potential (hyperpolarization and depolarization) produced changes in the fluorescence of the dye in agreement with its reported capability to detect variations in membrane potential.
(10) Alcian blue and Na+, both inducers of pinocytosis, differ in the manner with which they associate with the amoeba surface, suggesting the possibility of different pinocytosis-inducing sites on the amoeba surface.
(11) PHA-stimulated T-lymphocytes, depleted of T8-bearing cells by complement-mediated lysis, were unable to kill amoebae.
(12) Results show that the 3-D disc is mostly preceded by impressions of elastic amoeba-like deformations, whereas the 3-D egg is mostly preceded by the percept of a rotating flat ellipse.
(13) In contrast, incorporation by amoebae starving in suspension culture continued for 6-8 h. Similar patterns of [35S]sulphate incorporation were observed for two other strains of D. discoideum (strains AX2 and NC4) and for Polysphondylium violaceum.
(14) Focal contact sites are left behind on the glass surface ('footprints') when the amoeba moves away.
(15) Treatment during starvation of D. discoideum amoebae with micromolar amounts of A23187 causes an enhanced aggregation.
(16) Many trophozoite-target interfaces were outlined with a ring of polymerized amoeba actin, revealed by rhodamine-phalloidin staining of glutaraldehyde-fixed and Triton-X 100-extracted cells.
(17) Similar treatment of nonpathogenic amoebae had no effect on susceptibility to complement.
(18) An extracellular cyclic nucleotide phosphodiesterase was isolated from either growing cultures or aggregating amoebas of Dictyostelium discoideum.
(19) The establishment of amoebae leading to acute liver abscess was accompanied by significantly reduced levels of antibodies to the plasma membrane (PM) protein of E. histolytica, reduced direct macrophage cytotoxicity, and reduced anti-PM antibody-mediated macrophage-dependent cytotoxicity to amoebic trophozoites.
(20) When developing cultures of Dictyostelium discoideum are disaggregated at any time prior to cell wall formation and challenged to reinitiate development, amoebae will progress through the original sequence of morphogenetic stages, but the second time through they will do so in roughly one-tenth the original time, a process known as 'rapid recapitulation'.
Yeast
Definition:
(n.) The foam, or troth (top yeast), or the sediment (bottom yeast), of beer or other in fermentation, which contains the yeast plant or its spores, and under certain conditions produces fermentation in saccharine or farinaceous substances; a preparation used for raising dough for bread or cakes, and making it light and puffy; barm; ferment.
(n.) Spume, or foam, of water.
(n.) A form of fungus which grows as indvidual rounded cells, rather than in a mycelium, and reproduces by budding; esp. members of the orders Endomycetales and Moniliales. Some fungi may grow both as a yeast or as a mycelium, depending on the conditions of growth.
Example Sentences:
(1) The data on mapping the episomal plasmid integration sites in yeast chromosomes I, III, IV, V, VII, XV are presented.
(2) The amino-terminal region of a 70 kDa mitochondrial outer membrane protein of yeast and the presequence of cytochrome c1, an inner membrane protein exposed to the intermembrane space, are thought to be responsible for localizing the proteins in their final destinations after synthesis in the cytosol.
(3) It has 61% homology with tRNA(Leu)(anticodon m5CAA) and 63% homology with tRNA(Leu)(anticodon UAG), the two other known yeast tRNAs(Leu).
(4) The yeasts amounts used did not protect the test animals from the kidney infiltration with lipids and cholesterol; 12 g of yeasts per 100 g of the ration promoted elevation of sialic acid content in the blood plasma.
(5) Sequence specific binding of protein extracts from 13 different yeast species to three oligonucleotide probes and two points mutants derived from Saccharomyces cerevisiae DNA binding proteins were tested using mobility shift assays.
(6) Recently, we have designed a series of simplified artificial signal sequences and have shown that a proline residue in the signal sequence plays an important role in the secretion of human lysozyme in yeast, presumably by altering the conformation of the signal sequence [Yamamoto, Y., Taniyama, Y., & Kikuchi, M. (1989) Biochemistry 28, 2728-2732].
(7) Using polyclonal antibodies raised against yeast p34cdc2, we have detected a 36 kd immunoactive polypeptide in macronuclei which binds to Suc1 (p13)-coated beads and closely follows H1 kinase activity.
(8) The fifth plasmid contains sequences which are repeated in the yeast genome, but it is not known whether any or all of the ribosomal protein gene on this clone contains repetitive DNA.
(9) The behaviour of the enzyme from Candida utilis and from Baker's yeast on columns of these and of Blue Sepharose CL-6B was examined, together with the behaviour of the contaminating enzyme, ribulose 5-phosphate 3-epimerase (EC 5.1.3.1).
(10) The most striking homology was to yeast SEC7 in the central domain of the gene (57% identical over 466 bp) and also the protein level (42% identical amino acids; 39% conserved amino acids).
(11) Dialyzed crude enzyme extracts from yeast cells were found to destroy diacetyl in a manner quite similar to that of diacetyl reductase from Aerobacter aerogenes, and both the bacterial and the yeast extracts were stimulated significantly by the addition of reduced nicotinamide adenine dinucleotide (NADH).
(12) D-Mannitol has not so far been known as a major product of sugar metabolism by yeasts.
(13) A multiprotein complex that specifically recognizes cellular origins of DNA replication has been identified and purified from the yeast Saccharomyces cerevisiae.
(14) When these sequences were fused to the N terminus of yeast cytochrome oxidase subunit IV lacking its own presequence, they directed the attached subunit IV to its correct intramitochondrial location in vivo.
(15) Escherichia coli tRNAAsp possessing a modified G residue, the Q base, at the first position of the anticodon, showed a weaker self-association than yeast tRNAAsp but its complex with E. coli tRNAVal was found to be only 1.5 times less stable than that between yeast tRNAAsp and E. coli tRNAVal.
(16) Growth of C. albicans in the presence of AGE affected the yeast lipid in a number of ways: the total lipid content was decreased; garlic-grown yeasts had a higher level of phosphatidylserines and a lower level of phosphatidylcholines; in addition to free sterols and sterol esters, C. albicans accumulated esterified steryl glycosides; the concentration of palmitic acid (16:0) and oleic acid (18:1) increased and that of linoleic acid (18:2) and linolenic acid (18:3) decreased.
(17) The antibiotic was effective against Gram-positive bacteria, fungi and yeasts, and prolonged the life span of mice bearing Ehrlich ascites carcinoma.
(18) Genes of the baker's yeast Saccharomyces cerevisiae are densely clustered on 16 linear chromosomes.
(19) The strong homology of mammalian L27' to yeast L29 suggests a function which has been conserved throughout evolution, and thus L27' may also be involved in peptidyl transferase activity.
(20) Plasma- and yeast-derived vaccines have been compared in several studies and their immunological properties were found to be similar, including the persistence of antibodies induced by either type of vaccine.