Cellular Polarity in Prokaryotic Organisms
... could be used to direct proteins to one pole if there was a single polymeric ring and the targeted protein selectively bound only one face. However, the structure of this polymer in vivo is not clear (Li et al. 2007) and it may form multiple coil-like structures at mid-cell that do not have definiti ...
... could be used to direct proteins to one pole if there was a single polymeric ring and the targeted protein selectively bound only one face. However, the structure of this polymer in vivo is not clear (Li et al. 2007) and it may form multiple coil-like structures at mid-cell that do not have definiti ...
The DREAM Complex Mediates GIST Cell Quiescence and Is a
... 2. This process involves the DREAM complex as evidenced by upregulation of p130, increased p130/E2F4/LIN37 complex formation, and enhanced phosphorylation of the DREAM subunit LIN52. 3. Importantly, inhibition of DREAM complex formation, abrogation of quiescence by siRNA-mediated knock-down of LIN52 ...
... 2. This process involves the DREAM complex as evidenced by upregulation of p130, increased p130/E2F4/LIN37 complex formation, and enhanced phosphorylation of the DREAM subunit LIN52. 3. Importantly, inhibition of DREAM complex formation, abrogation of quiescence by siRNA-mediated knock-down of LIN52 ...
PDF
... and transverse optical sectioning of live hoxb1b−/−;Gt(CtnnaCitrine)ct3a embryos (Fig. 1C), we mapped the tissue structure defects specifically to the dorsal part of r3/4, often resulting in duplicated small lumina at lateral positions. To uncover the critical time window for Hoxb1b function in norm ...
... and transverse optical sectioning of live hoxb1b−/−;Gt(CtnnaCitrine)ct3a embryos (Fig. 1C), we mapped the tissue structure defects specifically to the dorsal part of r3/4, often resulting in duplicated small lumina at lateral positions. To uncover the critical time window for Hoxb1b function in norm ...
CH 12 Notes - Haiku Learning
... internal and external structures of organisms: the greater the number of homologous Morphological features, the more closely related they are ...
... internal and external structures of organisms: the greater the number of homologous Morphological features, the more closely related they are ...
DNA Topoisomerase II Is Required at the Time of Mitosis in Yeast.
... 1982; Pruss et al., 1982), in eukaryotes the role of topoisomerase II is much less clear. Results with SV40 and yeast suggest that topoisomerase II activity is required to allow the segregation of circular DNA molecules after replication; in the absence of topoisomerase II activity, replicated circu ...
... 1982; Pruss et al., 1982), in eukaryotes the role of topoisomerase II is much less clear. Results with SV40 and yeast suggest that topoisomerase II activity is required to allow the segregation of circular DNA molecules after replication; in the absence of topoisomerase II activity, replicated circu ...
10 Smooth Muscle
... which the myofilaments (actin) appear to insert. The cytoplasmic dense bodies contain αactinin, an actin-binding protein. Desmin, the most abundant intermediate filament, and vimentin also insert into these anchoring points. The sarcolemma is covered externally by a thick external lamina consisting ...
... which the myofilaments (actin) appear to insert. The cytoplasmic dense bodies contain αactinin, an actin-binding protein. Desmin, the most abundant intermediate filament, and vimentin also insert into these anchoring points. The sarcolemma is covered externally by a thick external lamina consisting ...
topic8 NR
... 2. spines – cacti and others – reduction in leaves reduces water loss and protects from predators 3. reproductive leaves – as in maternity plant, walking fern 4. window leaves – cone-shaped leaves with a transparent tip; allows light into hollow interior, thus allowing some buried plant parts to hav ...
... 2. spines – cacti and others – reduction in leaves reduces water loss and protects from predators 3. reproductive leaves – as in maternity plant, walking fern 4. window leaves – cone-shaped leaves with a transparent tip; allows light into hollow interior, thus allowing some buried plant parts to hav ...
Topic 8: Structure and Function of Vascular Plant Cells and Tis
... 1. bulbs – swollen, knoblike underground stems with fleshy leaves attached (onions, lilies, tulips) 2. corms – like bulbs but with no fleshy leaves attached 3. rhizomes – horizontal underground stems (ferns, irises, perennial grasses) 4. runners and stolons – horizontal stems above ground (strawberr ...
... 1. bulbs – swollen, knoblike underground stems with fleshy leaves attached (onions, lilies, tulips) 2. corms – like bulbs but with no fleshy leaves attached 3. rhizomes – horizontal underground stems (ferns, irises, perennial grasses) 4. runners and stolons – horizontal stems above ground (strawberr ...
chapter 7 a tour of the cell
... 1. Mitochondria and chloroplasts are the main energy transformers of cells • Mitochondria and chloroplasts are the organelles that convert energy to forms that cells can use for work. • Mitochondria are the sites of cellular respiration, generating ATP from the catabolism of sugars, fats, and other ...
... 1. Mitochondria and chloroplasts are the main energy transformers of cells • Mitochondria and chloroplasts are the organelles that convert energy to forms that cells can use for work. • Mitochondria are the sites of cellular respiration, generating ATP from the catabolism of sugars, fats, and other ...
A phenylalanine-based folding determinant in intestinal sucrase
... immunoglobulin binding protein, BiP, and a putative retention signal of the protein in the cis-Golgi (Propsting et al., 2003). Here, mutant SI binds BiP and calnexin and then sequential binding to these chaperones takes place. The protein is then brought to the cis-Golgi where it is blocked and brou ...
... immunoglobulin binding protein, BiP, and a putative retention signal of the protein in the cis-Golgi (Propsting et al., 2003). Here, mutant SI binds BiP and calnexin and then sequential binding to these chaperones takes place. The protein is then brought to the cis-Golgi where it is blocked and brou ...
Conservation of Cell Order in Desiccated Mesophyll of
... cell contents. However, high magnification examination of these membranes showed the electron-translucent band to be the central, translucent component of a tripartite membrane (Figs 3 and 6). Within the chloroplasts, the entire photosynthetic membrane continuity (i.e. the granal-fretwork system) wa ...
... cell contents. However, high magnification examination of these membranes showed the electron-translucent band to be the central, translucent component of a tripartite membrane (Figs 3 and 6). Within the chloroplasts, the entire photosynthetic membrane continuity (i.e. the granal-fretwork system) wa ...
Cell cycle regulation during early mouse embryogenesis.
... Copp observed that while the number of cells composing the mural trophectoderm increases considerably in late blastocyst embryos, mural trophectodermal cells divide slower than polar ones [16-18]. This observation leads to the proposal that trophectodermic cells are essentially generated in the pola ...
... Copp observed that while the number of cells composing the mural trophectoderm increases considerably in late blastocyst embryos, mural trophectodermal cells divide slower than polar ones [16-18]. This observation leads to the proposal that trophectodermic cells are essentially generated in the pola ...
Cell cycle parameters of hESC are highly similar to - HAL
... Numerous studies have been performed in order to precisely determine the cell cycle parameters during early stages of development and clearly established that these parameters are greatly modified during pre-implantation development. Differences were observed between the values obtained in these stu ...
... Numerous studies have been performed in order to precisely determine the cell cycle parameters during early stages of development and clearly established that these parameters are greatly modified during pre-implantation development. Differences were observed between the values obtained in these stu ...
Lesson Overview
... Because the proteins embedded in the lipid bilayer can move around and “float” among the lipids, and because so many different kinds of molecules make up the cell membrane, scientists describe the cell membrane as a “fluid mosaic.” ...
... Because the proteins embedded in the lipid bilayer can move around and “float” among the lipids, and because so many different kinds of molecules make up the cell membrane, scientists describe the cell membrane as a “fluid mosaic.” ...
Lysosomal enzymes in the macronucleus of Tetrahymena
... Apoptosis, or programmed cell death (PCD), is essential for the development and the homeostatic maintenance of multicellular organisms.1,2 It is a morphologically distinct form of cell death that can result in the rapid removal of unwanted or potentially dangerous cells. Apoptotic cells become small ...
... Apoptosis, or programmed cell death (PCD), is essential for the development and the homeostatic maintenance of multicellular organisms.1,2 It is a morphologically distinct form of cell death that can result in the rapid removal of unwanted or potentially dangerous cells. Apoptotic cells become small ...
Cells - MCQ topic quiz
... Multiple choice questions allow rapid coverage of a wide range of sub-topics. Contrary to a widespread belief among students, multiple choice questions are not necessarily easy – they can be easy, moderate or difficult. The questions are written so that the incorrect answers are plausible distractor ...
... Multiple choice questions allow rapid coverage of a wide range of sub-topics. Contrary to a widespread belief among students, multiple choice questions are not necessarily easy – they can be easy, moderate or difficult. The questions are written so that the incorrect answers are plausible distractor ...
Embryology
... What results from completion of meiosis? -Chromosome count of zygote? The First Week of Development -What happens as zygote travels through oviduct toward uterus? -What does this process form? (a mass structure composed of individual...) -Toward the end of this process, compaction occurs, resulting ...
... What results from completion of meiosis? -Chromosome count of zygote? The First Week of Development -What happens as zygote travels through oviduct toward uterus? -What does this process form? (a mass structure composed of individual...) -Toward the end of this process, compaction occurs, resulting ...
Human Endothelial Cells Express Integrin Receptors on the Luminal
... is of particular relevance on EC, since it is abundantly expressed and can bind many different matrix and plasma proteins. It is still unknown whether integrin receptors are selectively located to the basal side of EC membrane or may also be exposed on the cell surface in contact with blood. This is ...
... is of particular relevance on EC, since it is abundantly expressed and can bind many different matrix and plasma proteins. It is still unknown whether integrin receptors are selectively located to the basal side of EC membrane or may also be exposed on the cell surface in contact with blood. This is ...
Ultrastructure of a Magnetotactic Spirillum
... Cells were cultured in serum-stoppered bottles under microaerobic conditions. The atmosphere of each bottle was displaced with N2. After autoclaving, sterile air was injected to produce a final 02 concentration of 1 to 3% (vol/vol). Incubation was at 30°C after the addition of a 5% (vol/vol) inoculu ...
... Cells were cultured in serum-stoppered bottles under microaerobic conditions. The atmosphere of each bottle was displaced with N2. After autoclaving, sterile air was injected to produce a final 02 concentration of 1 to 3% (vol/vol). Incubation was at 30°C after the addition of a 5% (vol/vol) inoculu ...
pdf version - Melorheostosis
... • Sclerodermatous skin lesions • Muscle atrophy • Hemangiomas • Lymphoedema www.melorheostosis.org/ PIF_Monica.htm ...
... • Sclerodermatous skin lesions • Muscle atrophy • Hemangiomas • Lymphoedema www.melorheostosis.org/ PIF_Monica.htm ...
Meiosis
... Stages of Meiosis • Meiosis is a form of cell division that produces daughter cells with half the number of chromosomes that are in the parent cell. • During meiosis, a diploid cell goes through two divisions to form four haploid cells. • In meiosis I, homologous chromosomes are separated. In meios ...
... Stages of Meiosis • Meiosis is a form of cell division that produces daughter cells with half the number of chromosomes that are in the parent cell. • During meiosis, a diploid cell goes through two divisions to form four haploid cells. • In meiosis I, homologous chromosomes are separated. In meios ...
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.