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dead-end filtration of disrupted saccharomyces cerevisiae yeast
dead-end filtration of disrupted saccharomyces cerevisiae yeast

The importance of diffusion in the microbial world
The importance of diffusion in the microbial world

... coefficient (D) for small molecules, the time is of the order of milliseconds. Because the turnover rate for most enzymatic reactions is a few hundreds per second, substrate and product molecules can thus move through the entire cell volume may times within the timing of a single round of enzyme act ...
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... time-lapse live imaging of intracellular components inside cells, while measuring forces; (3) the approach is simple and inexpensive; (4) this method should be adaptable for many different contexts and walled-cell types. In our initial study (Minc, Boudaoud, et al., 2009), we used the rod-shape fiss ...
The importance of diffusion in the microbial world
The importance of diffusion in the microbial world

... coefficient (D) for small molecules, the time is of the order of milliseconds. Because the turnover rate for most enzymatic reactions is a few hundreds per second, substrate and product molecules can thus move through the entire cell volume may times within the timing of a single round of enzyme act ...
Dishevelled 2 signaling promotes self
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... cell markers, such as Nestin and CD133, but not markers of the differentiated neural lineage (3-7). Although these cells represent only a small fraction of the tumor bulk, their high self-renewal capacity is thought to sustain tumor growth. The identification of signaling pathways that maintain the ...
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... the endoplasmic reticulum and Golgi apparatus,5,6 proliferate, and produce extracellular matrix components.1,7,8 Subsequently, SMCs are transformed into foam cells by accumulating lipids.9 –11 In these pathologies, SMCs undergo a phenotypic modulation12,13 where they change from a contractile to a s ...
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... Explain the process of cell differentiation as the basis for the hierarchical organization of organisms (including cells, tissues, organs, and organ systems). Summarize the H.B.2D.2 characteristics of the cell cycle: interphase (called G1, S, G2); the phases of mitosis (called prophase, metaphase, a ...
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halobac~~al glycofrotein saccharides contain covalently linked

... 35SO~--labelled glycoprotein’was digested with pronase. Sulphate containing peptides were purified and separated by HPLC as in section 2 (Bg.3A). The fractions containing radioactivity were analyzed for their sugar contents. Each of the peaks (a-i) contains glucose and galactose, but no amino sugars ...
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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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