Regulation of germ line stem cell homeostasis
... al., 2012; Lu et al., 2013). Lymph and blood vessels also occupy the interstitial space and must contribute to SSC maintenance and self-renewal since these cells are always located at the proximity of the testicular capillaries (Yoshida et al., 2007). Little is known about the factors that emanate f ...
... al., 2012; Lu et al., 2013). Lymph and blood vessels also occupy the interstitial space and must contribute to SSC maintenance and self-renewal since these cells are always located at the proximity of the testicular capillaries (Yoshida et al., 2007). Little is known about the factors that emanate f ...
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... (PRML) at a density of 50,000 cells mL−1 . Plates containing solid protoplast regeneration medium (PRMB) overlain with cellophane were inoculated with 1 mL of protoplast suspension and incubated for 24 h at 25o C with constant illumination at 50–80 µmol m−2 . For regeneration of protonemal filaments ...
... (PRML) at a density of 50,000 cells mL−1 . Plates containing solid protoplast regeneration medium (PRMB) overlain with cellophane were inoculated with 1 mL of protoplast suspension and incubated for 24 h at 25o C with constant illumination at 50–80 µmol m−2 . For regeneration of protonemal filaments ...
1992 - Morphostasis
... differentiation requires that they uncouple from each other: it is left to unusually tightly bound endothelial cells to restrict the ingress of scavenger cells and thus reduce the susceptibility of these tissues to inflammation. Thus far, the basic process is the same for almost every, if not all, a ...
... differentiation requires that they uncouple from each other: it is left to unusually tightly bound endothelial cells to restrict the ingress of scavenger cells and thus reduce the susceptibility of these tissues to inflammation. Thus far, the basic process is the same for almost every, if not all, a ...
Active gel physics
... have the capacity to polymerize at one end of the filament and depolymerize at the other end. This process, known as treadmilling, occurs under physiological conditions, and plays an important role in cell motility, cell signalling and mitotic spindle assembly1 . Cytoskeletal filaments have another ...
... have the capacity to polymerize at one end of the filament and depolymerize at the other end. This process, known as treadmilling, occurs under physiological conditions, and plays an important role in cell motility, cell signalling and mitotic spindle assembly1 . Cytoskeletal filaments have another ...
Water movement between epidermal cells of barley leaves – a
... leaves was investigated. Cells analysed had either an intact or a more or less damaged cellular environment. Cell damage caused large pressure differentials (0·9 MPa) between damaged and adjacent intact cells. Turgor in cells adjacent to damaged cells decreased significantly. Turgor decreases were t ...
... leaves was investigated. Cells analysed had either an intact or a more or less damaged cellular environment. Cell damage caused large pressure differentials (0·9 MPa) between damaged and adjacent intact cells. Turgor in cells adjacent to damaged cells decreased significantly. Turgor decreases were t ...
Mineral formation by bacteria in natural microbial communities
... evaporation from the calcite-supersaturated aqueous environment within which these structures are usually found [24,26]. It is probably a combination of both, with each type predominating at particular times, depending on seasonal environmental variations. Whatever the mechanism of CaCO3 formation m ...
... evaporation from the calcite-supersaturated aqueous environment within which these structures are usually found [24,26]. It is probably a combination of both, with each type predominating at particular times, depending on seasonal environmental variations. Whatever the mechanism of CaCO3 formation m ...
cell behaviour during active cell rearrangement: evidence and
... retraction of their margins, first along one axis and then another (Fig . 2) . The area, the length/width ratio and the perimeter of contact with adjacent cells change as each cell undergoes these repetitive extensions and retractions of its margins. Deep cells are intimately connected to one anothe ...
... retraction of their margins, first along one axis and then another (Fig . 2) . The area, the length/width ratio and the perimeter of contact with adjacent cells change as each cell undergoes these repetitive extensions and retractions of its margins. Deep cells are intimately connected to one anothe ...
Mutational analysis of the early f orespore/mother
... Computer analysis of the SpoIIGA a m i n o acid sequence h a s predicted the presence of five membrane-spanning domains in the N-terminal half of the protein (Stragier et af., 1988). The distribution of positive charges found in the connecting loops also predicted that the large soluble C-terminal d ...
... Computer analysis of the SpoIIGA a m i n o acid sequence h a s predicted the presence of five membrane-spanning domains in the N-terminal half of the protein (Stragier et af., 1988). The distribution of positive charges found in the connecting loops also predicted that the large soluble C-terminal d ...
Geographic Information Systems - CEProfs
... statistics of the cell values within each zone. Table rows correspond to zones and columns to statistics. The statistics are: majority, maximum, mean, median, minimum, minority, range, standard deviation, sum and variety. The zones can be defined by polygons or (integer) grid cells with the same val ...
... statistics of the cell values within each zone. Table rows correspond to zones and columns to statistics. The statistics are: majority, maximum, mean, median, minimum, minority, range, standard deviation, sum and variety. The zones can be defined by polygons or (integer) grid cells with the same val ...
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... cells adopt two different fates, designated nf and ns, in exact alternation within the blast cell column; this is termed a grandparental stem cell lineage. To lay groundwork for investigating unequal divisions in the leech Helobdella, we have surveyed the Helobdella robusta genome for genes encoding ...
... cells adopt two different fates, designated nf and ns, in exact alternation within the blast cell column; this is termed a grandparental stem cell lineage. To lay groundwork for investigating unequal divisions in the leech Helobdella, we have surveyed the Helobdella robusta genome for genes encoding ...
Non-genetic heterogeneity of cells in development: more than just
... simple question, the answer to which we might take for granted: how can the same set of genes generate vastly distinct, stable, and often inherited gene expression profiles and, thereby, distinct phenotypes? This question is at the core of multipotency, as discussed below. To avoid ambiguities in fu ...
... simple question, the answer to which we might take for granted: how can the same set of genes generate vastly distinct, stable, and often inherited gene expression profiles and, thereby, distinct phenotypes? This question is at the core of multipotency, as discussed below. To avoid ambiguities in fu ...
Synaptic basis for intense thalamocortical activation of feedforward
... their paired RS cells (17/20 pairs, data not shown). Inhibitory conductances tend to suppress responsiveness, so we reasoned that relatively large Gi values might contribute to the weak RS responses. However, we found that Gi amplitudes were larger in FS cells than in RS cells (17 of 21 paired compa ...
... their paired RS cells (17/20 pairs, data not shown). Inhibitory conductances tend to suppress responsiveness, so we reasoned that relatively large Gi values might contribute to the weak RS responses. However, we found that Gi amplitudes were larger in FS cells than in RS cells (17 of 21 paired compa ...
TCS Cellworks and Essen have entered into a strategic relationship
... Ltd. , developer of the live-cell AngioKit™ an in vitro co-culture model of angiogenesis, have entered into a strategic partnership to promote and distribute live-cell angiogenesis kits compatible with Essen’s imaging technology. Angiogenesis is the multi-step process whereby new blood vessels devel ...
... Ltd. , developer of the live-cell AngioKit™ an in vitro co-culture model of angiogenesis, have entered into a strategic partnership to promote and distribute live-cell angiogenesis kits compatible with Essen’s imaging technology. Angiogenesis is the multi-step process whereby new blood vessels devel ...
The interplay between chromosome stability and cell cycle control
... instability. Generally, the yeast genes that affect chromosome stability function in DNA repair, replication, recombination, chromosome segregation, cell cycle control (3). Importantly, many of these genes function in processes that are similar to the processes that affect human chromosome stability ...
... instability. Generally, the yeast genes that affect chromosome stability function in DNA repair, replication, recombination, chromosome segregation, cell cycle control (3). Importantly, many of these genes function in processes that are similar to the processes that affect human chromosome stability ...
pdf: Xu et al. 2008
... the ethylene response pathway. Furthermore, the FEI proteins interact directly with ACC synthase. These results suggest that the FEI proteins define a novel signaling pathway that regulates cell wall function, likely via an ACC-mediated signal. ...
... the ethylene response pathway. Furthermore, the FEI proteins interact directly with ACC synthase. These results suggest that the FEI proteins define a novel signaling pathway that regulates cell wall function, likely via an ACC-mediated signal. ...
A novel isoform of the smooth muscle cell
... Materials and methods Cloning of mouse smoothelin A part of the presumptive mouse smoothelin cDNA sequence was deduced from overlapping expressed sequence tags (GenBank) with homology to the known parts of the human smoothelin cDNA (EMBL accession number Z49989). Various primer pairs were designed t ...
... Materials and methods Cloning of mouse smoothelin A part of the presumptive mouse smoothelin cDNA sequence was deduced from overlapping expressed sequence tags (GenBank) with homology to the known parts of the human smoothelin cDNA (EMBL accession number Z49989). Various primer pairs were designed t ...
Surviving apoptosis: life–death signaling in single cells
... apoptosis pathway (and the interactions among them), rather than variation in a single protein, determine whether apoptosis occurs in response to death ligand. Thus, cells treated with death ligand may die or survive depending on their location in a multidimensional phase space of protein expression ...
... apoptosis pathway (and the interactions among them), rather than variation in a single protein, determine whether apoptosis occurs in response to death ligand. Thus, cells treated with death ligand may die or survive depending on their location in a multidimensional phase space of protein expression ...
The hypersensitive response and the induction of cell death in plants
... type of direct interaction may not only happen in the plasma membrane but also in the cytoplasm (Jones, 1997) and in the nucleus (Leister et al, 1996; Van den Ackerveken et al, 1996). The earliest changes observed following pathogen recognition are an oxidative burst, resulting in production of Reac ...
... type of direct interaction may not only happen in the plasma membrane but also in the cytoplasm (Jones, 1997) and in the nucleus (Leister et al, 1996; Van den Ackerveken et al, 1996). The earliest changes observed following pathogen recognition are an oxidative burst, resulting in production of Reac ...
Biology 2121 Review – Cell Structure and Function (Chapter 3
... inclusions; endomembrane system; cilia; flagella; anucleate; chromatin; chromosome; interphase; mitosis; cell cycle; helicase; polymerase; chromatids; cytokinesis; cyclins; prophase; anaphase; metaphase; telophase; transcription; translation; nucleic acid; messenger, ribosomal and transfer RNA; intr ...
... inclusions; endomembrane system; cilia; flagella; anucleate; chromatin; chromosome; interphase; mitosis; cell cycle; helicase; polymerase; chromatids; cytokinesis; cyclins; prophase; anaphase; metaphase; telophase; transcription; translation; nucleic acid; messenger, ribosomal and transfer RNA; intr ...
Chapter 23 ppt
... organelles with membranes •May also have small loops of additional genes: • Do not have plasmids mitochondria or chloroplasts so use cell membranes to carry out cellular respiration or photosynthesis ...
... organelles with membranes •May also have small loops of additional genes: • Do not have plasmids mitochondria or chloroplasts so use cell membranes to carry out cellular respiration or photosynthesis ...
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... at opposite ends, and a radial pattern with concentric tissue layers. Most studies to date have focused on Arabidopsis because of its highly regular pattern of cell division; little is known about the molecular and cellular mechanisms underlying patterning in species with less regular divisions. Muc ...
... at opposite ends, and a radial pattern with concentric tissue layers. Most studies to date have focused on Arabidopsis because of its highly regular pattern of cell division; little is known about the molecular and cellular mechanisms underlying patterning in species with less regular divisions. Muc ...
AtLSG1-2 Regulates Leaf Growth by Affecting Cell Proliferation and
... AtLSG1-2 is a circularly permuted GTPase required for ribosome biogenesis and recently shown to be involved in early leaf development, although it was unclear how AtLSG1-2 affects leaf growth. Here, we found that atlsg1-2 mutants had reduced leaf size as a result of decreased cell size and cell numb ...
... AtLSG1-2 is a circularly permuted GTPase required for ribosome biogenesis and recently shown to be involved in early leaf development, although it was unclear how AtLSG1-2 affects leaf growth. Here, we found that atlsg1-2 mutants had reduced leaf size as a result of decreased cell size and cell numb ...
Biology 13100 (by Ken Robinson, revised 2009 by NPelaez) The
... stomata. A single pore, a stoma, is created by the gap between two specialized epithelial cells called guard cells. The stomata allow the evaporated water to escape, which is necessary for the generation of negative pressure in the xylem, and also allow CO2 to enter, which is necessary for photosyn ...
... stomata. A single pore, a stoma, is created by the gap between two specialized epithelial cells called guard cells. The stomata allow the evaporated water to escape, which is necessary for the generation of negative pressure in the xylem, and also allow CO2 to enter, which is necessary for photosyn ...
Cytokinesis
Cytokinesis (cyto- + kinesis) is the process during cell division in which the cytoplasm of a single eukaryotic cell is divided to form two daughter cells. It usually initiates during the early stages of mitosis, and sometimes meiosis, splitting a mitotic cell in two, to ensure that chromosome number is maintained from one generation to the next. After cytokinesis two (daughter) cells will be formed that are exact copies of the (parent) original cell. After cytokinesis, each daughter cell is in the interphase portion of the cell cycle. In animal cells, one notable exception to the normal process of cytokinesis is oogenesis (the creation of an ovum in the ovarian follicle of the ovary), where the ovum takes almost all the cytoplasm and organelles, leaving very little for the resulting polar bodies, which then die. Another form of mitosis without cytokinesis occurs in the liver, yielding multinucleate cells. In plant cells, a dividing structure known as the cell plate forms within the centre of the cytoplasm and a new cell wall forms between the two daughter cells.Cytokinesis is distinguished from the prokaryotic process of binary fission.