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Evolutionary aspects of non-cell-autonomous regulation in vascular
Evolutionary aspects of non-cell-autonomous regulation in vascular

... 1A) but there are significant differences in membrane lipids and cell wall composition, as well as in the hormonal regulatory networks, between charophytes at the base and angiosperms at the top of land plant evolution, which can potentially impact the structure and function of PD in different taxa ...
Microbiology 6/e
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MATH 100 V1A
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... for some constant k (to be determined). From class, we know that the solutions to this differential equation are of the form P (t) = Aekt , for some other constant A (also to be determined). We are also told that the cell culture initially has 500 cells, so 500 = P (0) = Ae0 = A. Therefore our equat ...
Structure and Functions of Ribosomes
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... A stop codon is encountered at the A site which causes the release factor to bind to the A site along with GTP instead of aminoacyltRNA The release factor binds to the stop codon and the bond holding the polypeptide chain to the tRNA site at the P site is hydrolyzed, catalyzed by the peptidyl tranfe ...
Transcriptomic analysis of stage 1 versus advanced adult granulosa
Transcriptomic analysis of stage 1 versus advanced adult granulosa

... when compared to the stage 1 aGCT while the expression of 8 genes was down regulated in the advanced aGCT at a signiicance of p < 0.05. The full list of 26 gene probes is shown in Supplementary Table 1. Unsupervised hierarchical clustering of the 24 genes is presented as a Heat Map which shows clear ...
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Human Vascular Smooth Muscle Cells Contain Functional Estrogen
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Imaging cytoskeletal filament organization at the molecular scale
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The plant cytoskeleton - The Company of Biologists
The plant cytoskeleton - The Company of Biologists

... actin cables (i.e. transversely). No specific actin fluorescence is observed at pre­ prophase when microtubules form the pre-prophase band, nor are actin filaments seen during the early stages of mitosis. Towards telophase, however, when the phragmoplast microtubules help deposit the new cell plate ...
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Flat file for auto loading into the CBO 1.0 version. Individual sections

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Cell polarity and tissue patterning in plants - Development
Cell polarity and tissue patterning in plants - Development

... cut stems and by local sources of auxin (Fig. 2A,B). Furthermore, in at least one case regeneration along a new polarity has been shown to be preceded by a new polarity of auxin transport (Gersani and Sachs, 1984), so that changes indicated by microscopy correspond to those measured by physiological ...
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Review Physiological Significance of Morpho

... level, there are certain appendages which help the plant to secrete excess of salts from the main body. Most important among them are salt secretory trichome (e.g. Atriplex spp.). Second type is that of multicellular salt glands which occur in many flowering plants of desert and coastal habitats, an ...
CYTOCHALASIN B: ASPECTS OF PHAGOCYTOSIS IN NUTRIENT
CYTOCHALASIN B: ASPECTS OF PHAGOCYTOSIS IN NUTRIENT

... (not synthesized de novo by Tetrahymena (Kidder & Dewey, 1951)) can overcome the need for food vacuole formation both in the presence of cytochalasin B (present paper) and in the particle-free proteose peptone broth (Rasmussen, 1974). Summing up, phagocytosis can be significantly reduced in 2 ways, ...
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Cellular differentiation



In developmental biology, cellular differentiation isa cell changes from one cell type to another. Most commonly this is a less specialized type becoming a more specialized type, such as during cell growth. Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types. Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and during normal cell turnover. Some differentiation occurs in response to antigen exposure. Differentiation dramatically changes a cell's size, shape, membrane potential, metabolic activity, and responsiveness to signals. These changes are largely due to highly controlled modifications in gene expression and are the study of epigenetics. With a few exceptions, cellular differentiation almost never involves a change in the DNA sequence itself. Thus, different cells can have very different physical characteristics despite having the same genome.A cell that can differentiate into all cell types of the adult organism is known as pluripotent. Such cells are called embryonic stem cells in animals and meristematic cells in higher plants. A cell that can differentiate into all cell types, including the placental tissue, is known as totipotent. In mammals, only the zygote and subsequent blastomeres are totipotent, while in plants many differentiated cells can become totipotent with simple laboratory techniques. In cytopathology, the level of cellular differentiation is used as a measure of cancer progression. ""Grade"" is a marker of how differentiated a cell in a tumor is.
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