... that uses Arg in the synthesis of muscle creatin. Arg is considered an important modulator of immunological and physiological processes. The degradation of Arg produces ornithine, a precursor of polyamines that are key to cell division, DNA synthesis, and cell cycle regulation. Arg participates in t ...
Stem cells: the intestinal stem cell as a paradigm
... therefore exists, the function of which is to populate these cellular tissue compartments. We call these the stem cells. The study of stem cells is of medical importance as: (i) homeostatic mechanisms of stem cell proliferation are the same processes that become disregulated in carcinogenesis. Disco ...
... therefore exists, the function of which is to populate these cellular tissue compartments. We call these the stem cells. The study of stem cells is of medical importance as: (i) homeostatic mechanisms of stem cell proliferation are the same processes that become disregulated in carcinogenesis. Disco ...
Ch 5 Cell Transport Supplemental Notes
... Cell Membrane Pumps, continued • Sodium-Potassium Pump – The sodium-potassium pump moves three Na+ ions into the cell’s external environment for every two K+ ions it moves into the cytosol. – ATP supplies the energy that drives the pump. ...
... Cell Membrane Pumps, continued • Sodium-Potassium Pump – The sodium-potassium pump moves three Na+ ions into the cell’s external environment for every two K+ ions it moves into the cytosol. – ATP supplies the energy that drives the pump. ...
Ch 5 Notes
... Cell Membrane Pumps, continued • Sodium-Potassium Pump – The sodium-potassium pump moves three Na+ ions into the cell’s external environment for every two K+ ions it moves into the cytosol. – ATP supplies the energy that drives the pump. ...
... Cell Membrane Pumps, continued • Sodium-Potassium Pump – The sodium-potassium pump moves three Na+ ions into the cell’s external environment for every two K+ ions it moves into the cytosol. – ATP supplies the energy that drives the pump. ...
Formative Cell Divisions: Principal Determinants of Plant
... In dividing animal cells, the orientation of cell division relies on intrinsic (Cowan and Hyman 2004) and extrinsic cortical polarity cues (Siller and Doe 2009), which specify the orientation of the mitotic spindle. In many instances, astral microtubules (MTs) originating from the spindle pole navig ...
... In dividing animal cells, the orientation of cell division relies on intrinsic (Cowan and Hyman 2004) and extrinsic cortical polarity cues (Siller and Doe 2009), which specify the orientation of the mitotic spindle. In many instances, astral microtubules (MTs) originating from the spindle pole navig ...
Provided for non-commercial research and educational use only
... self-organized structures require a constant flux of energy and/or matter to persist. As a non-biological example of self-assembly, consider the formation of salt crystals. As a contrasting example, the spontaneous emergence of convection rolls in water heated from below is due to self-organization; ...
... self-organized structures require a constant flux of energy and/or matter to persist. As a non-biological example of self-assembly, consider the formation of salt crystals. As a contrasting example, the spontaneous emergence of convection rolls in water heated from below is due to self-organization; ...
Small Cell Lung Cancer: Diagnosis, Treatment and Natural
... • Almost exclusively in smokers • Distinguished from NSCLC by: – Rapid doubling time – High growth fraction – Early development of wide-spread mets ...
... • Almost exclusively in smokers • Distinguished from NSCLC by: – Rapid doubling time – High growth fraction – Early development of wide-spread mets ...
CCHS Jacob Cebulak Hydrogen Peroxide Influence on Microbial
... cells/ml. The cultures were diluted in sterile dilution fluid to a concentration of approximately 105 cells/ml. The hydrogen peroxide was diluted with sterile dilution fluid to concentrations of 0%, .01%, .001%, .0001%, and .05% to total 9.9 ml. 0.1 ml. of cell culture was then added to the test tub ...
... cells/ml. The cultures were diluted in sterile dilution fluid to a concentration of approximately 105 cells/ml. The hydrogen peroxide was diluted with sterile dilution fluid to concentrations of 0%, .01%, .001%, .0001%, and .05% to total 9.9 ml. 0.1 ml. of cell culture was then added to the test tub ...
Proposal - people.vcu.edu
... Trombetta-Lima, 2012). Without proper cell adhesion in the epidermis, the skin would fail to maintain its protective state, ultimately leading to disease (Stalder, 2014 et al). One important type of cellular adhesive is known as the desmosome (Garrod & Chigdey, 2008). The desmosome is primarily foun ...
... Trombetta-Lima, 2012). Without proper cell adhesion in the epidermis, the skin would fail to maintain its protective state, ultimately leading to disease (Stalder, 2014 et al). One important type of cellular adhesive is known as the desmosome (Garrod & Chigdey, 2008). The desmosome is primarily foun ...
Down-Regulation of DNA Topoisomerase IIα Leads to Prolonged
... topoisomerase II␣ were down-regulated (Chen et al., 2003). Similar findings were reported when the effect of paclitaxel was studied in vivo on ovarian carcinoma xenografts. It is interesting that topoisomerase II␣ was consistently down-regulated, whereas p21 was up-regulated in the paclitaxel-respon ...
... topoisomerase II␣ were down-regulated (Chen et al., 2003). Similar findings were reported when the effect of paclitaxel was studied in vivo on ovarian carcinoma xenografts. It is interesting that topoisomerase II␣ was consistently down-regulated, whereas p21 was up-regulated in the paclitaxel-respon ...
Archaea - The Ancient Oddities
... • Unlike Eubacteria, none are known parasites or pathogens (are often mutualists or commensalists) ...
... • Unlike Eubacteria, none are known parasites or pathogens (are often mutualists or commensalists) ...
Non -Living Components of plant cell 1
... Crystals are outstanding or vesicular or stone, and is composed from the crystal body, The crystal body consists of carbonate Calcium, either the neck consists of cellulose, and can be observed in the skin an leaves cells of fig (Ficus) ...
... Crystals are outstanding or vesicular or stone, and is composed from the crystal body, The crystal body consists of carbonate Calcium, either the neck consists of cellulose, and can be observed in the skin an leaves cells of fig (Ficus) ...
selection of kidney cell types in primary glomerular explant
... had morphological properties identical to those of the glomerulus-derived tubular cells. It seems likely that small tubular fragments attached to a minority of the glomeruli are the source of these glomerulus-derived tubular cells. Neither epithelial cell type could be subcultured on plastic, but bo ...
... had morphological properties identical to those of the glomerulus-derived tubular cells. It seems likely that small tubular fragments attached to a minority of the glomeruli are the source of these glomerulus-derived tubular cells. Neither epithelial cell type could be subcultured on plastic, but bo ...
chlamydomonas gymnogama and - The Journal of Cell Biology
... nants. It is possible that partial lysis of cell walls tein similar chemically to that of cell walls reinoccurs before and during the wall-shedding proc- forces the idea that what are at present undetectaess, as partial lysis of cell walls has been observed ble or relatively subtle differences in ch ...
... nants. It is possible that partial lysis of cell walls tein similar chemically to that of cell walls reinoccurs before and during the wall-shedding proc- forces the idea that what are at present undetectaess, as partial lysis of cell walls has been observed ble or relatively subtle differences in ch ...
Role of reactive oxygen species in cell signalling pathways Abstract
... reported the presence of several gp91-phox homologues in mammals [20,21], suggesting that the NADPH oxidase family of enzymes may have much wider roles in controlling cellular function than first thought. In plants too, homologues have been reported. For example, Arabidopsis thaliana has six variant ...
... reported the presence of several gp91-phox homologues in mammals [20,21], suggesting that the NADPH oxidase family of enzymes may have much wider roles in controlling cellular function than first thought. In plants too, homologues have been reported. For example, Arabidopsis thaliana has six variant ...
In EVALUATION OF PHOTOTOXIC PROPERTIES OF FOUR STRUCTURALLY RELATED
... to kill test cell lines, we have developed an assay system which measures viability colorimetrically by measuring the activity of mitochondria1 hydrogenases. The assay has been described previously (Mosmann, 1983) and the concentration of blue formazan, produced by cleavage of the yellow tetrazolium ...
... to kill test cell lines, we have developed an assay system which measures viability colorimetrically by measuring the activity of mitochondria1 hydrogenases. The assay has been described previously (Mosmann, 1983) and the concentration of blue formazan, produced by cleavage of the yellow tetrazolium ...
The endocytic network in plants
... as endocytic markers that are internalized into plant cells by a process with the characteristics of receptor-mediated endocytosis [38]. Non-biotinylated BSA and HRP do not enter plant cells, which indicates that the uptake of these markers depends on a specific receptor that recognizes the biotin m ...
... as endocytic markers that are internalized into plant cells by a process with the characteristics of receptor-mediated endocytosis [38]. Non-biotinylated BSA and HRP do not enter plant cells, which indicates that the uptake of these markers depends on a specific receptor that recognizes the biotin m ...
What are plastids and where did they come from?
... linking them with prokaryotic ribosomes and are different to those eukaryotic-type ribosomes found in the cytoplasm of the cell. 6. Plastids are capable of division within the plant cell and divide by a process of binary fission, similar in many ways to the division process of bacteria. The theory o ...
... linking them with prokaryotic ribosomes and are different to those eukaryotic-type ribosomes found in the cytoplasm of the cell. 6. Plastids are capable of division within the plant cell and divide by a process of binary fission, similar in many ways to the division process of bacteria. The theory o ...
Gram Stain
... The Gram stain is the most common differential stain used in microbiology. Differential stains use more than one dye. The unique cellular components of the bacteria will determine how they will react to the different dyes. The Gram stain procedure has been basically unchanged since it was first deve ...
... The Gram stain is the most common differential stain used in microbiology. Differential stains use more than one dye. The unique cellular components of the bacteria will determine how they will react to the different dyes. The Gram stain procedure has been basically unchanged since it was first deve ...
student notes - Science and Plants for Schools
... practice there will be interconversion of different carbohydrates taking place. In the light, the stoma is open allowing greater exchange of material between the air spaces in the leaf and the leaf surroundings. Water is moving up the xylem, and diffusing through the airspace into the air surroundin ...
... practice there will be interconversion of different carbohydrates taking place. In the light, the stoma is open allowing greater exchange of material between the air spaces in the leaf and the leaf surroundings. Water is moving up the xylem, and diffusing through the airspace into the air surroundin ...
Cell Cycle Phase Specificity and Biochemical
... RNA, and protein syntheses in L1210 cells required 0.5, 0.4, and 2 ¿tg of the drug per ml. Thus, LI 210 cells were about 4 to 5 times more sensitive than DON cells. Response of Synchronous DON Cells. Results with synchronous DON cells exposed for 1 hr in different phases of the cell cycle are shown ...
... RNA, and protein syntheses in L1210 cells required 0.5, 0.4, and 2 ¿tg of the drug per ml. Thus, LI 210 cells were about 4 to 5 times more sensitive than DON cells. Response of Synchronous DON Cells. Results with synchronous DON cells exposed for 1 hr in different phases of the cell cycle are shown ...
Cell Structure and Function Chapter 4 Outline Cell Theory Cell Size
... Cell theory states all organisms are composed of cells and that cells come only from preexisting cells. – One of unifying concepts of biology. ...
... Cell theory states all organisms are composed of cells and that cells come only from preexisting cells. – One of unifying concepts of biology. ...
ACP Level 1 A Microscopic Look at Essential Oils
... Plant chemistry became an established university discipline at the end of the 19th century; since then many new structures have been discovered. The number of natural products obtained from plants exceeds 100,000 and each year new chemical compounds are discovered. Although the functions of some pla ...
... Plant chemistry became an established university discipline at the end of the 19th century; since then many new structures have been discovered. The number of natural products obtained from plants exceeds 100,000 and each year new chemical compounds are discovered. Although the functions of some pla ...
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.