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Fighting Infection - The immune system WORD 120 KB
Fighting Infection - The immune system WORD 120 KB

... people in the future (such as genetic material, and some can from the Fighting Infection research into infectious diseases) be very dangerous (pathogenic) context  scientists face ethical dilemmas  the immune system is cells,  follow a sequence of steps to (such as keeping David Vetter tissues an ...
Spirochaeta isovalerica sp. nov., a Marine Anaerobe That Forms
Spirochaeta isovalerica sp. nov., a Marine Anaerobe That Forms

... was supplied in combination with leucine, isoleucine, and valine. These data indicate that S. isovalerica is primarily a saccharolytic species and that it lacks the ability to use most compounds other than carbohydrates as growth substrates. In this respect, S. isovalericu resembles other free-livin ...
Article - Archive ouverte UNIGE
Article - Archive ouverte UNIGE

... retains powerful inductive capabilities in that it induces new hair follicle formation when associated with afollicular or wound epidermis (Oliver, 1970; Reynolds, 1989). The vibrissa follicle dermal sheath cells also possess distinctive properties, since they can be the source of regenerated Journa ...
Using food and controlling growth - Delivery guide
Using food and controlling growth - Delivery guide

... Learners often believe that plants photosynthesise in the day and only respire at night whilst others believe that leaves photosynthesise and roots respire. It could be valuable to start the topic by looking at respiration and why organisms undergo the process to make learners aware of the consequen ...
Metabolic Basis of Visual Cycle Inhibition by Retinoid and
Metabolic Basis of Visual Cycle Inhibition by Retinoid and

... in the visual cycle (27), and to bind RPE65 (28). Fenretinide Mice were maintained continuously in darkness, and all experslowed the flux of retinoids into the eyes, most probably by imental manipulations were performed under dim red light reducing levels of vitamin A bound to serum retinol-binding ...
Determination and morphogenesis in the sea urchin embryo
Determination and morphogenesis in the sea urchin embryo

... of cell interactions in establishing the overall pattern of the embryo; and the cellular and molecular bases of gastrulation which lead to the formation of the organs of the pluteus larva. Practitioners of molecular biology, cellular biology or embryology tend to have their own sets of biases or ass ...
Wilson, S. I., Graziano, E., Harland, R., Jessell, T. M., and - ICB-USP
Wilson, S. I., Graziano, E., Harland, R., Jessell, T. M., and - ICB-USP

... Background: In Xenopus embryos, fibroblast growth factors (FGFs) and secreted inhibitors of bone morphogenetic protein (BMP)-mediated signalling have been implicated in neural induction. The precise roles, if any, that these factors play in neural induction in amniotes remains to be established. Res ...
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1 Distinct FAK activities determine progenitor

... Together, these results support a model wherein FAK deletion impaired self-renewal of basal MaSCs and LPs, thereby reducing the content of these populations in MFCKO mice. To determine directly the role of FAK in maintaining MaSCs in vivo, we used limiting dilution transplantation assays to assess t ...
Nucleotide sequences and further characterization of human
Nucleotide sequences and further characterization of human

... the top, with additional structures aligned according to this reference genome. (A) The full-length CaSki HPV-16 genome present in clone p894 and two off-sized genomic structures [represented by clones p895 and p896 ; see Baker et al. (1987) for further details] whose junctional nucleotides were det ...
Loosening of plant cell walls by expansins
Loosening of plant cell walls by expansins

... pollen (called Zea m1) showed it to have wall-loosening activity characteristic of expansin36, but with an intriguing twist: the allergen induced extension only in grass cell walls and was not effective on walls from dicotyledons. This activity has since been confirmed for group-1 allergens from oth ...
Mechanism of Induction: Induced Pluripotent Stem Cells (iPSCs)
Mechanism of Induction: Induced Pluripotent Stem Cells (iPSCs)

Manipulation of oxidative protein folding and PDI redox state in
Manipulation of oxidative protein folding and PDI redox state in

... incubated for different times in the absence of the reducing agent. Each sample was treated with AMS and the electrophoretic mobility of PDI analysed under nonreducing conditions. Consistent with the results shown in Figure 5B, PDI was more oxidized in Ero1-La overexpressing cells (Figure 5C, compar ...
Manipulation of oxidative protein folding and PDI redox state in
Manipulation of oxidative protein folding and PDI redox state in

... incubated for different times in the absence of the reducing agent. Each sample was treated with AMS and the electrophoretic mobility of PDI analysed under nonreducing conditions. Consistent with the results shown in Figure 5B, PDI was more oxidized in Ero1-La overexpressing cells (Figure 5C, compar ...
Origin of Land Plants (Embryophytes)
Origin of Land Plants (Embryophytes)

... 2. *(=Rhynia major) now Aglaophyton major ...
Knocking on the heaven`s wall: pathogenesis of and resistance to
Knocking on the heaven`s wall: pathogenesis of and resistance to

... and contain a heptad repeat ‘SNARE motif’ of 60–70 amino acids that can participate in coiled-coil formation. Syntaxins play a crucial role in vesicle trafficking by cycling in target membranes between a monomeric form and hetero-complexes that include various other SNARE-motif-containing proteins [ ...
PROGRAMMED CELL DEATH IN PLANT DISEASE
PROGRAMMED CELL DEATH IN PLANT DISEASE

... apoptosis (75). However, this assay must be used with caution since DNA degraded during nonapoptotic cell death and during the fixing of tissue also may give positive reactions (45, 115). ...
Heterogeneous chromatin mobility derived from chromatin
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Conference16 - Zodletone Spring
Conference16 - Zodletone Spring

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Movement of rice yellow mottle virus between xylem cells through pit

... source to sink leaves (9). Recently it was shown that phloem transport of soluble carboxyfluorescein and potato virux X was similar, including the unloading of both solute and virus from minor veins (10). Long-distance movement involves different The publication costs of this article were defrayed i ...
The Induction of 72-kD Gelatinase in T Cells upon Adhesion to
The Induction of 72-kD Gelatinase in T Cells upon Adhesion to

... induction in vitro, the cells were cocultured in the following system. Endothelial cells were cultured to form a confluent monolayer in collagen I-coated T-75 tissue culture flasks and then serum starved for 24 h. T cells (2 × 106/ml), suspended in serum-free DMEM, were then added to the endothelial ...
Development - Columbia University Medical Center
Development - Columbia University Medical Center

... rostrocaudal (RC) and dorsoventral (DV) character in neural progenitor cells (Bronner-Fraser and Fraser, 1997; Jessell, 2000; Lumsden and Krumlauf, 1996; Stern, 2001). During neurulation, progenitor cells located in different RC domains of the neural tube become exposed to signals that impose DV reg ...
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Strategies utilized by trophically diverse fungal

... the local pH at the infection site to support the increased expression of pathogenicity factors and enzymes associated with pathogenicity (Denison 2000, Yakoby et al. 2000, Prusky et al. 2001, Eshel et al. 2002, Prusky and Yakoby 2003, Felle et al. 2004). Significant differences in apoplastic H+ con ...
AS Biology cell membranes
AS Biology cell membranes

... Some phospholipids have carbohydrates attached to them – GLYCOLIPIDS Some of the proteins have carbohydrates attached to them – GLYCOPROTEINS The membrane also contains molecules of CHOLESTEROL AS Biology. Foundation. Cell membranes and Transport ...
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... Which source of fuel molecules is more important, and why? ...
AS Biology FOUNDATION Chapter 4 CELL MEMBRANES and
AS Biology FOUNDATION Chapter 4 CELL MEMBRANES and

... Some phospholipids have carbohydrates attached to them – GLYCOLIPIDS Some of the proteins have carbohydrates attached to them – GLYCOPROTEINS The membrane also contains molecules of CHOLESTEROL AS Biology. Foundation. Cell membranes and Transport ...
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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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