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Cell-Cell Interactions
Cell-Cell Interactions

... Each of these receptors has a binding site for DNA. In its inactive state, the receptor typically cannot bind DNA because an inhibitor protein occupies the binding site. When the signal molecule binds to another site on the receptor, the inhibitor is released and the DNA binding site is exposed (fig ...
Disruption of a Dynamin Homologue Affects Endocytosis, Organelle
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... other dynamin-related proteins, is described. Dynamin A is present during all stages of D. discoideum development and is found predominantly in the cytosolic fraction and in association with endosomal and postlysosomal vacuoles. Overexpression of the protein has no adverse effect on the cells, where ...
Leukaemia Section T-cell/histiocyte-rich large B cell lymphoma Atlas of Genetics and Cytogenetics
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... overlapping region Xq12q13), 4q (41%, minimal overlapping region 4q25q26), Xp (29%, minimal overlapping region Xp21p11), and 18q (24%, minimal overlapping region 18q21), as well as loss of 17p (24%) (Franke et al., 2002). ...
Scalable Recombinant Adeno-Associated Virus Production
Scalable Recombinant Adeno-Associated Virus Production

... spectrum of diseases (Aucoin et al., 2008). AAV is a dependovirus whose full life cycle is complemented by a helper virus, most often adenovirus or herpes simplex virus (Muzyczka and Berns, 2001). In addition, AAV wild-type infections lack pathological effects, conferring an added measure of safety ...
Phragmoplastin dynamics: multiple forms
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... along the microtubules of phragmoplast to the forming cell plate (Staehelin and Hepler, 1996; Verma, 2001; Smith, 2001; Jurgens and Geldner, 2002; Bednarek and Falbel, 2002). This is based largely on observations from electron microscopy. A recent study on the formation of syncytial-type cell plates ...
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Genetic transformation of HeLa cells by Agrobacterium - igem

... whom reprint requests should be addressed. E-mail: [email protected]. ...
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BIOGRAPHICAL SKETCH NAME: Saghizadeh, Mehrnoosh eRA
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... The most remarkable feature of the IF is its huge amount of periplasmic material. Although a number of proteins are located in the periplasm (Gortz et al., 1988; and unpublished), the nature and significance of the periplasmic material are largely unknown. During the infection process the IF always ...
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... At 6 months after DMEK, specular microscopy shows a normal quiescent endothelial cell layer with a regular hexagonal pattern. (Upper second left and Lower second left image) At 24 months after DMEK, however, in the complete absence of any clinical signs of an allograft rejection, the overall cell mo ...
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Two-step process for photoreceptor formation inDrosophila
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... morphology of outer PRCs and express rh1, they express early R7speci®c markers. There are examples of transformation of inner into outer PRCs, for instance in mis-expression experiments with rough or seven-up18,19. However, in these cases, the transformation occurs much earlier in the disc and conce ...
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MS-LS1-1 From Molecules to Organisms: Structures and Processes

... Students who demonstrate understanding can: MS-LS1-4. Use argument based on empirical evidence and scientific reasoning to support an explanation for how characteristic animal behaviors and specialized plant structures affect the probability of successful reproduction of animals and plants respectiv ...
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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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