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INTRODUCTION - UEA Digital Repository
INTRODUCTION - UEA Digital Repository

... expressed posterior to that level. The structures along the proximal-distal axis of the limb are specified by the expression of Hox genes in a similar way. Hox gene expresson in the chick limb bud is quite dynamic pattern with three independently regulated phases of expression. In phase 1, Hox genes ...
Electrophysiology of Hypothalamic Magnocellular Neurons In vitro
Electrophysiology of Hypothalamic Magnocellular Neurons In vitro

... depending upon the neuroendocrine system considered. Among these systems, hypothalamo-neurohypophyseal magnocellular neurons have been early-considered models, as they typically display an electrical activity consisting of bursts of action potentials that is optimal for the release of boluses of the ...
Memory device that programs more than two states into memory cell
Memory device that programs more than two states into memory cell

... substantially focused on four different resistance levels or states and 2 bits of data per cell. HoWever, this is for illustrative purposes only and not intended to limit the scope of the invention. In principle it is possible to store 3 or more states. To program a phase-change memory cell to an ...
Molecular cytogenetic studies and technology development
Molecular cytogenetic studies and technology development

... distant breeding is sometimes impossible. In Araceae, there is no report yet on successful intergeneric hybrid production. One of the ways to overcome the barriers is asexual hybridization through protoplast fusion. Protoplasts are plant cells without cell wall. Therefore, they can be easily fused. ...
p23 and organization of the Golgi apparatus
p23 and organization of the Golgi apparatus

... between a p24 protein and a cargo molecule has been reported. However, it is possible that p24-cargo interactions are weak and/or transient, and cannot be revealed by classical biochemical approaches. Alternatively, it is possible that p24 proteins do not directly interact with cargo molecules, and ...
Purification, Cloning, and Functional Characterization of a Novel
Purification, Cloning, and Functional Characterization of a Novel

... reaction in macrophages (14 ), to inhibit the replication of hepatitis B virus (15 ), to suppress the invasion of liver cancer cells (7 ) and tumor growth in hepatoma-bearing mice (11 ), to induce cytokine production and increase the population of CD4(+) T cells (16 ), and also to inhibit the infect ...
Optical mapping of atrioventricular node reveals a - AJP
Optical mapping of atrioventricular node reveals a - AJP

... monitored from 124 of 144 diodes. The image of the AV node was focused on the array at a magnification of 30.36 such that each diode detected fluorescence APs from a 0.46 3 0.46 mm area of epicardium. The depth of field of the collecting lens restricted the fluorescence measurements to a layer of ce ...
Presentation - MIT Lincoln Laboratory
Presentation - MIT Lincoln Laboratory

... Issue  shape of cell – spherical would be more efficient, but cubic is easier to control Issue  size of cell – smaller cells mean less useless force computations, but more difficult control. Limit is where the cell is the atom itself. ...
title of the thesis - UWSpace
title of the thesis - UWSpace

... gastrulation. The spatial and temporal regulation of cell movement requires a highly coordinated cross-talk between cadherin and integrin adhesion receptors. While the adhesive properties and morphogenetic movements are well described, the molecular mechanisms controlling these behaviors remain unkn ...
Optical mapping of atrioventricular node reveals
Optical mapping of atrioventricular node reveals

... on the triangle of Koch. Fluorescence emission from the stained tissue was collected with a camera lens (50 mm, f1:1.4, Nikon), projected through a 630-nm cut-off filter (RG-645, Schott Glass), and focused to form an image of the preparation on the surface of a 12 3 12 photodiode array (Centronic, N ...
The Function of Vascular Endothelial Growth Factor
The Function of Vascular Endothelial Growth Factor

... pregnancy, as well as in inflammation and skeletal muscle growth. In addition, angiogenesis plays an important role in several pathological conditions such as cancer and atherosclerosis, as well as in ocular pathologies such as age-related macular degeneration and diabetic retinopathy (Chung and Fer ...
Applied and Environmental Microbiology
Applied and Environmental Microbiology

... The time course and orientation of attachment of Rhizobium trifolii 0403 to white clover root hairs was examined in slide cultures by light and electron microscopy. Inocula were grown for 5 days on defined Bll agar medium and represented the large subpopulation of fully encapsulated single cells whi ...
Cellular control of cholesterol
Cellular control of cholesterol

... particles from which lipids and cholesterol can be extracted. Fats are digested by lipases and solubilized by bile from the liver. The combination of lipases and bile converts fat into small miscelles that contain a mixture of lipids, triglycerides and cholesterol. Lipids and cholesterol were origin ...
Multiple Heterologies Increase Mitotic Double-Strand
Multiple Heterologies Increase Mitotic Double-Strand

... invasion (DasGupta and Radding 1982), although this may be important only with highly diverged sequences. In large part, inhibition is mediated by the mismatch repair system (de Wind et al. 1995; Selva et al. 1995; Chambers et al. 1996; Datta et al. 1996, 1997; Negritto et al. 1997), which is though ...
Sequestration of host metabolism by an intracellular pathogen | eLife
Sequestration of host metabolism by an intracellular pathogen | eLife

Anatomical characteristics of roots of citrus rootstocks that vary in
Anatomical characteristics of roots of citrus rootstocks that vary in

... shoot-growth rates, lower maximum photosynthetic rates, lower dark-respiration rates and lower concentrations of photosynthetic enzymes. Although the data are much more sparse, similar suites of correlated traits among plants can also occur in the fine, absorptive roots (Eissenstat, 1992). Among Cit ...
A proximal conserved repeat in the Xist gene is
A proximal conserved repeat in the Xist gene is

... During the early development of female mammals, one of the two X chromosomes undergoes transcriptional silencing along almost the entire region of the chromosome to achieve dosage equivalence with males of the X-linked genes, which females have twice as many of as males do (X-inactivation) (Lyon, 19 ...
Bachelor of Arts in Biology - University of Iowa
Bachelor of Arts in Biology - University of Iowa

... Statistics - Choose one of the following options: - Statistical Methods and Computing (STAT:2010, 3 s.h., Fall and Spring semesters) - Biostatistics (STAT:3510, 3 s.h., Fall and Spring semesters) Physics - Choose one of the following sequences: - College Physics I (PHYS:1511, 4 s.h., Fall and Spring ...
Identification of Myosin XI Receptors in Arabidopsis Defines a
Identification of Myosin XI Receptors in Arabidopsis Defines a

... To characterize the mechanism of myosin XI-K attachment to its principal cargo, we performed a yeast two-hybrid (Y2H) screen using the Universal Arabidopsis Normalized Library and myosin XI-K GTD as the bait. Diploids were selected on 3-amino-1,2,4triazole–containing medium lacking Leu, Trp, and His ...
Exocytosis Precedes and Predicts the Increase in
Exocytosis Precedes and Predicts the Increase in

... observed that the distance between these two optical fringes oscillates in a pattern that relates to the oscillation in growth rate (Figure 2). These two optical fringes are usually quite different in magnitude, with the inner fringe normally dominating (Figure 1B). Because of this inequality, the l ...
Desmin Is Essential for the Tensile Strength and
Desmin Is Essential for the Tensile Strength and

... change in myofiber architecture occurs whereby Z disks become aligned, nuclei move from central to peripheral locations, and tubules adopt a transverse orientation. The preexisting desmin IF networks shift from a longitudinal to a predominantly transverse orientation, associated with the Z disk. Sk ...
Branching of Sensory and Sympathetic Neurites in vitro Is Inhibited
Branching of Sensory and Sympathetic Neurites in vitro Is Inhibited

... characteristic neuronal shapes. Observations and manipulations in vivo also indicate that intrinsic factors determine important aspects of neuronal form (Sotelo and Arsenio-Nunes, 1976; Van der Loos, 1965). It is clear, then, from a variety of studies that intrinsic regulatory factors contribute to ...
Two-Tiered Inhibition of Axon Regeneration at the Dorsal Root Entry
Two-Tiered Inhibition of Axon Regeneration at the Dorsal Root Entry

... DREZ, regenerating axons form club-like end bulbs or synapselike structures, (Ramon y Cajal, 1928; Carlstedt, 1985), but because of the prohibitive environment of the CNS and a paltry regenerative response of sensory neurons to rhizotomy, they never re-enter the adult cord. One strategy to encourage ...
Specific Organization of Golgi Apparatus in Plant Cells
Specific Organization of Golgi Apparatus in Plant Cells

... occurs along cytoskeleton fibrils; however, over long distances organelles are moved along actin filaments with involvement of “rapid” myosins, whereas the microtubules are responsible for “anchoring” or deceleration of the movement of organelles and, possibly, for their transfer over small distance ...
A single-headed fission yeast myosin V transports actin in a
A single-headed fission yeast myosin V transports actin in a

... Va myosin from vertebrates is shown for comparison. To directly show the state of oligomerization of Myo51, we visualized the motor by EM of negatively stained samples (Fig. S1). The images showed a single-headed motor, consistent with the low predicted coiled-coil propensity of the tail. Representa ...
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Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
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