Type study Paramecium
... into two and fuses to form synkaryon or zygote. Then the Paramecium starts to divide to produce daughter paramecia. • Hemixis • In this method fragmentation and division of macronucleus takes place without any activity of micronucleus. • Cytogamy • It takes place in two individuals. In this process ...
... into two and fuses to form synkaryon or zygote. Then the Paramecium starts to divide to produce daughter paramecia. • Hemixis • In this method fragmentation and division of macronucleus takes place without any activity of micronucleus. • Cytogamy • It takes place in two individuals. In this process ...
How much territory can a single E. coli cell control?
... longer than the parent cell. When the population is subcultured into LBNS, every cell continues to elongate and cannot divide, so that they gradually grow longer over the next 15–24 h. This elongation occurs at many points along the cell (Woldringh et al., 1987). The exact pattern of elongation poin ...
... longer than the parent cell. When the population is subcultured into LBNS, every cell continues to elongate and cannot divide, so that they gradually grow longer over the next 15–24 h. This elongation occurs at many points along the cell (Woldringh et al., 1987). The exact pattern of elongation poin ...
Optical measurement of cell membrane tension
... RBCs lack nuclei and organelles and can be assumed optically homogeneous, i.e. characterized by a constant refractive index. Therefore, measurement of the cell optical path-length via interferometric techniques can provide information about the physical topography of the membrane with sub-wavelength ...
... RBCs lack nuclei and organelles and can be assumed optically homogeneous, i.e. characterized by a constant refractive index. Therefore, measurement of the cell optical path-length via interferometric techniques can provide information about the physical topography of the membrane with sub-wavelength ...
THINK ABOUT IT
... • Help cells move Microfilament assembly and disassembly is responsible for the cytoplasmic movements that allow cells, such as amoebas, to crawl along surfaces. ...
... • Help cells move Microfilament assembly and disassembly is responsible for the cytoplasmic movements that allow cells, such as amoebas, to crawl along surfaces. ...
Fat Body Cells of the Frceze-tolerant
... from inoculative freezing from ice in the surrounding media. In mammalian cells that are rapidly cooled, inoculative freezing of the intracellular fluid occurs between * 5 and -30'C depending on the cell type, however nucleation is typically blocked by the cell membrane at temperaturesabove - l5'C ( ...
... from inoculative freezing from ice in the surrounding media. In mammalian cells that are rapidly cooled, inoculative freezing of the intracellular fluid occurs between * 5 and -30'C depending on the cell type, however nucleation is typically blocked by the cell membrane at temperaturesabove - l5'C ( ...
Programmed cell death during plant growth and development
... There is continuing interest in whether apoptosis occurs in plants. Electron microscopy has revealed that during apoptosis in animals, chromatin condenses and segregates into sharply delineated masses positioned at the nuclear envelope (Ellis et al, 1991; Kerr and Harmon, 1991). Condensed chromatin ...
... There is continuing interest in whether apoptosis occurs in plants. Electron microscopy has revealed that during apoptosis in animals, chromatin condenses and segregates into sharply delineated masses positioned at the nuclear envelope (Ellis et al, 1991; Kerr and Harmon, 1991). Condensed chromatin ...
Role of bilateral zones of ingressing superficial cells
... (Fig. 9). These may be superficial cells in the process of leaving the surface. More laterally, cells with many protrusions appear to be contacting, and possibly migrating over, each other and the blastocoel wall. The extent to which the deep layer contributes to mesodermal structures cannot be quan ...
... (Fig. 9). These may be superficial cells in the process of leaving the surface. More laterally, cells with many protrusions appear to be contacting, and possibly migrating over, each other and the blastocoel wall. The extent to which the deep layer contributes to mesodermal structures cannot be quan ...
#6012-27 Recent Developments in PON Systems Standards in ITU-T
... In BT trials Reuse of copper offers lower CapEx than FTTP OpEx costs under investigation in trials Capacity is reach dependent • Subtended MSANs or Fiber could solve this • CO fed fibers are most likely to be used ...
... In BT trials Reuse of copper offers lower CapEx than FTTP OpEx costs under investigation in trials Capacity is reach dependent • Subtended MSANs or Fiber could solve this • CO fed fibers are most likely to be used ...
Modeling Membrane Movements
... 3. This time, the students who held hands to form a protein channel will now face the lower concentrated side and each puts one hand out in front to receive a molecule. Before they can accept a molecule, a sticker must be placed on their shoulder. This sticker represents a phosphate molecule donated ...
... 3. This time, the students who held hands to form a protein channel will now face the lower concentrated side and each puts one hand out in front to receive a molecule. Before they can accept a molecule, a sticker must be placed on their shoulder. This sticker represents a phosphate molecule donated ...
Mechanobiology of bone cells
... that a number of proteins can be physically stretched and alter their functional states (44). As we have found, upon physical stress to integrins the focal adhesion proteins talin and vinculin are accumulated (37). Experiments now demonstrated that application of physicals forces causes stretching o ...
... that a number of proteins can be physically stretched and alter their functional states (44). As we have found, upon physical stress to integrins the focal adhesion proteins talin and vinculin are accumulated (37). Experiments now demonstrated that application of physicals forces causes stretching o ...
Tns (H-300): sc-28542 - Santa Cruz Biotechnology
... of adherens junctions in muscle and non-muscle cells. Tensin is involved in the maintenance of cellular structure by anchoring actin filaments at the focal adhesion via F-Actin binding and capping activities. However, tensin also contains a Src homology 2 (SH2) domain and has the ability to be phosp ...
... of adherens junctions in muscle and non-muscle cells. Tensin is involved in the maintenance of cellular structure by anchoring actin filaments at the focal adhesion via F-Actin binding and capping activities. However, tensin also contains a Src homology 2 (SH2) domain and has the ability to be phosp ...
Full-Text PDF
... turn, displaces older wall regions outward toward both poles (i.e., “bipolar” expansion). Additionally, other areas of wall deposition have been noted in development [29]. During cell division, post-mitotic daughter nuclei are rapidly translocated from the isthmus, each to the center of a soon-to-be ...
... turn, displaces older wall regions outward toward both poles (i.e., “bipolar” expansion). Additionally, other areas of wall deposition have been noted in development [29]. During cell division, post-mitotic daughter nuclei are rapidly translocated from the isthmus, each to the center of a soon-to-be ...
Penium margaritaceum: A Unicellular Model Organism for
... turn, displaces older wall regions outward toward both poles (i.e., “bipolar” expansion). Additionally, other areas of wall deposition have been noted in development [29]. During cell division, post-mitotic daughter nuclei are rapidly translocated from the isthmus, each to the center of a soon-to-be ...
... turn, displaces older wall regions outward toward both poles (i.e., “bipolar” expansion). Additionally, other areas of wall deposition have been noted in development [29]. During cell division, post-mitotic daughter nuclei are rapidly translocated from the isthmus, each to the center of a soon-to-be ...
HIF-2α phosphorylation by CK1δ promotes erythropoietin secretion
... vitro phosphorylation sites of human HIF-2α. The fact that these sites are also subjected to modification by the kinases present in the Huh7 total cell protein extracts indicates that CK1δ represents one of the kinases that interact with HIF-2α in Huh7 cells. To study the effect of Ser383 and Thr528 ...
... vitro phosphorylation sites of human HIF-2α. The fact that these sites are also subjected to modification by the kinases present in the Huh7 total cell protein extracts indicates that CK1δ represents one of the kinases that interact with HIF-2α in Huh7 cells. To study the effect of Ser383 and Thr528 ...
Analytical tools for single-molecule fluorescence imaging in
... molecule approaches, arguably better termed ‘in cellulo’ approaches if one is observing single individual cells to discriminate from investigations on multicellular organisms (excepting single-celled organisms such as bacteria which can be described in both contexts), add significant insight not onl ...
... molecule approaches, arguably better termed ‘in cellulo’ approaches if one is observing single individual cells to discriminate from investigations on multicellular organisms (excepting single-celled organisms such as bacteria which can be described in both contexts), add significant insight not onl ...
Myotonica Kinase Identified Widely Expressed Dystrophia Three
... The IGRP peptide targeted by 8.3-like T cells (VYLKTNVFL) (14) is very similar in sequence to the superagonist 8.3 mimotope peptide NRP-V7 (KYNKANVFL) (25). These peptides have the same amino acids at positions 2 and 9, the H-2Kd-binding anchor positions (32), and at positions 4, 6, 7, and 8, which ...
... The IGRP peptide targeted by 8.3-like T cells (VYLKTNVFL) (14) is very similar in sequence to the superagonist 8.3 mimotope peptide NRP-V7 (KYNKANVFL) (25). These peptides have the same amino acids at positions 2 and 9, the H-2Kd-binding anchor positions (32), and at positions 4, 6, 7, and 8, which ...
The Cytoskeleton of Nerve Cells in Historic Perspective
... irregular, even jagged border" (von Kölliker, 1852). It was already evident at the time that at least some of these differences might be attributable to an inherent lability of the fibrillary material, which "on account of its great fragility breaks down easily into a powdery mass" (Remak, 1844, p. ...
... irregular, even jagged border" (von Kölliker, 1852). It was already evident at the time that at least some of these differences might be attributable to an inherent lability of the fibrillary material, which "on account of its great fragility breaks down easily into a powdery mass" (Remak, 1844, p. ...
The Care and Feeding of the Microscope Lab 5
... Magnification is the ratio of an object’s image size to its real size; magnification simply makes the objects or specimens appear larger. Resolution (resolving power) is the ability of an optical instrument to distinguish between two points that are close together, so that they are seen as separate ...
... Magnification is the ratio of an object’s image size to its real size; magnification simply makes the objects or specimens appear larger. Resolution (resolving power) is the ability of an optical instrument to distinguish between two points that are close together, so that they are seen as separate ...
Experimental and genetic analysis of root development in
... experimental manipulation: laser ablation studies The absolute correlation between cell type and embryonic lineage in the Arabidopsis promeristem could be explained in terms of lineage-dependent development. This would be in line with the classical concept of histogens as founder cells for specific ...
... experimental manipulation: laser ablation studies The absolute correlation between cell type and embryonic lineage in the Arabidopsis promeristem could be explained in terms of lineage-dependent development. This would be in line with the classical concept of histogens as founder cells for specific ...
Meiosis
... 3. In mitosis, the chromosomes line up on the metaphase plate, one sister chromatid on each side of the plate. In meiosis, homologous chromosomes—not sister chromatids—line up on opposite sides of the metaphase plate. ...
... 3. In mitosis, the chromosomes line up on the metaphase plate, one sister chromatid on each side of the plate. In meiosis, homologous chromosomes—not sister chromatids—line up on opposite sides of the metaphase plate. ...
Plant Cell Walls
... Many plant cells are approximately cylindrical, with the neighbouring microfibrils deposited parallel with each other so as to form ‘hoops’ around the cylinder (Figure 1). This arrangement dictates the direction in which the cell can elongate. New walls are usually formed soon after mitosis at such a ...
... Many plant cells are approximately cylindrical, with the neighbouring microfibrils deposited parallel with each other so as to form ‘hoops’ around the cylinder (Figure 1). This arrangement dictates the direction in which the cell can elongate. New walls are usually formed soon after mitosis at such a ...
Cooke Zeeman 1976 Wavefront model for morphogenesis
... somitogenesis itself then occurs in the successive isolation, by transverse fissures where cell de-adhesion occurs, of blocks of spindle-shaped cells. Each block is initially a regular number of cell-widths in extent, as counted along the animal's longitudinal axis, but then rotates through 90*, the ...
... somitogenesis itself then occurs in the successive isolation, by transverse fissures where cell de-adhesion occurs, of blocks of spindle-shaped cells. Each block is initially a regular number of cell-widths in extent, as counted along the animal's longitudinal axis, but then rotates through 90*, the ...
Multicellular life cycle of magnetotactic prokaryotes
... organisms with the same magnetotactic behavior as the mother-organism. Electron micrographs (Fig. 3) show that cells are arranged in a roughly helical distribution. Based on the helical organization of cells we hypothesize for the cell rearrangements during division to explain the maintenance of the ...
... organisms with the same magnetotactic behavior as the mother-organism. Electron micrographs (Fig. 3) show that cells are arranged in a roughly helical distribution. Based on the helical organization of cells we hypothesize for the cell rearrangements during division to explain the maintenance of the ...
Mitosis
Mitosis is a part of the cell cycle in which chromosomes in a cell nucleus are separated into two identical sets of chromosomes, each in its own nucleus. In general, mitosis (division of the nucleus) is often followed by cytokinesis, which divides the cytoplasm, organelles and cell membrane into two new cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic (M) phase of an animal cell cycle—the division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell.The process of mitosis is divided into stages corresponding to the completion of one set of activities and the start of the next. These stages are prophase, prometaphase, metaphase, anaphase, and telophase. During mitosis, the chromosomes, which have already duplicated, condense and attach to fibers that pull one copy of each chromosome to opposite sides of the cell. The result is two genetically identical daughter nuclei. The cell may then divide by cytokinesis to produce two daughter cells. Producing three or more daughter cells instead of normal two is a mitotic error called tripolar mitosis or multipolar mitosis (direct cell triplication / multiplication). Other errors during mitosis can induce apoptosis (programmed cell death) or cause mutations. Certain types of cancer can arise from such mutations.Mitosis occurs only in eukaryotic cells and the process varies in different organisms. For example, animals undergo an ""open"" mitosis, where the nuclear envelope breaks down before the chromosomes separate, while fungi undergo a ""closed"" mitosis, where chromosomes divide within an intact cell nucleus. Furthermore, most animal cells undergo a shape change, known as mitotic cell rounding, to adopt a near spherical morphology at the start of mitosis. Prokaryotic cells, which lack a nucleus, divide by a different process called binary fission.