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A nuclear lamin is required for cytoplasmic organization and egg polarity in Drosophila. Nature Cell Biology 3, 848-851. pdf
A nuclear lamin is required for cytoplasmic organization and egg polarity in Drosophila. Nature Cell Biology 3, 848-851. pdf

... n a screen of tracheal P[lacZ] transposon insertions for mutations that alter the outgrowth of terminal branches of the Drosophila tracheal (respiratory) system, we identified mutations in a nuclear lamin gene. The original allele (l(2)02459) was a P[lacZ] insertion at cytologic position 25F1-2 that ...
Nucleolar translocalization of GRA10 of Toxoplasma gondii
Nucleolar translocalization of GRA10 of Toxoplasma gondii

... 2007). Prior to interact with host cell nuclear proteins, GRA10 should be secreted across the PVM to the host cell cytoplasm (Fig. 1). Whether this occurs for GRA10 or not is currently unknown as in other dense granular proteins. PVM itself is not a rigid mold, is rather a biomembrane, where the end ...
Introduction - York College
Introduction - York College

... blue, green and red cones respectively. Rods come in a single variety and express the pigment rhodopsin. The rods are much more sensitive to light when compared with the cones. They become saturated in ambient light and active in dark of twilight. Once activated, rods and cones make synapses with h ...
Chapter 4
Chapter 4

... ____42. Of the following primitive Earth conditions and chemical reactions, which one do biochemists know was important to the formation of amino acids and subsequent formation of complex carbon molecules that are common to life? A. There had to be a reducing atmosphere rather than one with oxygen, ...
3.2 Cell Organelles 3.2 Cell Organelles
3.2 Cell Organelles 3.2 Cell Organelles

... system. • Many processes occur in the endoplasmic reticulum. • There are two types of endoplasmic reticulum. – rough endoplasmic reticulum ...
Age-related changes in lymphocyte development and function
Age-related changes in lymphocyte development and function

... changes that occur in B cell precursors and lead to more pronounced decreases in B cell production in selected subpopulations of animals. The effect of environmental factors may be of relevance when reconciling disparate data from different laboratories. Aging and secondary B cell development After ...
Role of the Neural Crest in Vertebrates Development and Evolution
Role of the Neural Crest in Vertebrates Development and Evolution

... ROLE of the NEURAL CREST in Vertebrates Development and Evolution ...
Science 10 - SharpSchool
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... K. The Particle Model of Matter  this model is used to understand the types of transport in cells: 1. All matter is made of ____________________ however they can be of _________________________________________________ 2. The particles of matter are _______________________________ _________________ ...
the role of disturbed ph dynamics and the na+/h+ exchanger in
the role of disturbed ph dynamics and the na+/h+ exchanger in

... membrane of epithelial cells. It is composed of 12 transmembrane segments and a long carboxy-terminal cytoplasmic tail that has a role in both its regulation and function (see figure). The first functions of NHE1 to be identified were its role in regulating pHi homeostasis, cell volume and prolifera ...
PLANT CELL WALL AND Contents
PLANT CELL WALL AND Contents

... A cell wall is a fairly rigid layer surrounds a cell and located external to the cell membrane, which provides the cell with structural support and protection. The cell wall also prevents overexpansion when water enters the cell. They are found in plants, bacteria, archaea, fungus, and algae. Animal ...
AFM of cell organelles
AFM of cell organelles

... images available, AFM only sparsely (yields information not only on topography but also mechanical properties) • AFM of photoreceptor ultimate goal ...
Constitutive caspase-like machinery executes programmed cell
Constitutive caspase-like machinery executes programmed cell

... elicitor causes rapid induction of different types of plant defense responses, including HR.16 ± 18 Recent accumulating evidence suggests that animal and plant PCD systems are similar in several aspects.2,3,10,12,13,19 ± 21 During the development and autolysis of xylem vessels in pea, the nuclei of ...
Differentiation in plant epidermal cells
Differentiation in plant epidermal cells

... at the same rate as they do, but cell division is arrested. After three rounds of endoreduplication, the cell expands outwards from the leaf surface as a single cone. This is followed by another round of endoreduplication after which branches are initiated (Oppenheimer, 1997). The pattern of trichom ...
No Slide Title
No Slide Title

... T-cells are negatively selected during development if they recognize self Activation of B-cells or T-cells requires two signals, exposure to the cognate antigen and cytokine stimulation from TH cells ...
Death associated proteins (DAPs)
Death associated proteins (DAPs)

... used to identify and study genes which function as positive mediators of apoptosis. Here, we address a novel approach of gene cloning aimed at isolating intracellular death promoting genes by utilizing a functional screen. This method, called TKO, was based on transfection of cells with an anti-sens ...
Normal and c-Myc-promoted human keratinocyte di
Normal and c-Myc-promoted human keratinocyte di

... stratifying cultures of primary keratinocytes by ¯owcytometry, after staining DNA with propidium iodide and without gating out events beyond G2/M (Figure 2). Cell aggregates were excluded on basis of the Width/Area (Figure 2a; see e.g., Ormerod, 1990). We have found that normal, stratifying cultures ...
Human Immunodeficiency Virus (HIV)-Resistant
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... No significant differences in the rate of cell growth between UT-7 and UT-7/fus cells were detected in the presence of IL-3 or GM-CSF (not shown). Similarly, the analysis of membrane antigens (CD4, CD31, CD41a, and glycophorin A) failed to evidentiate any modification in UT-7/fus with respect to UT- ...
MEMBRANE AND TRANSPORT ONLINE BIOLOGY DR. B PART I
MEMBRANE AND TRANSPORT ONLINE BIOLOGY DR. B PART I

... Surrounding every cell is some sort of covering that keeps what's inside the cell inside and prevents harmful particles in the external environment from diffusing into the cell. Both the cell membrane and the cell wall serve this function. All cells have a cell membrane, and certain cells (plant and ...
Francesca Cigliano
Francesca Cigliano

... When analyzed, one can see how a plant cell and an everyday restaurant are very similar; the plant cell’s organelles function similarly to specific jobs in the restaurant. The function of the nucleus of a plant cell is to control all activities of a cell (also known as the “control center” of a cell ...
- Institute of Education
- Institute of Education

... Cells were discovered by Robert Hooke in 1665. He used a simple glass lens to look at thin slices of cork. All organisms are made of cells. ...
Cells 4 Quail
Cells 4 Quail

... Diffusion • One way cells maintain homeostasis is by controlling the movement of substances across their cell membrane. • Cells must use energy to transport some substances across the cell membrane. – This is known as Active Transport • Other substances move across the cell membrane without any use ...
Potassium chloride (P5405) - Product Information Sheet
Potassium chloride (P5405) - Product Information Sheet

... preliminary X-ray analysis of the vanadiumdependent haloperoxidase from Corallina officinalis. FEBS Lett., 359(2-3), 244-246 (1995). 7. Wilhelm, H., et al., Purification of recombinant cyclin B1/cdc2 kinase from Xenopus egg extracts. Methods Enzymol., 283, 12-28 (1997). 8. Lambert, S. J., et al., Pu ...
Cytology
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... amount of genetic information - and this in each cell separately. For instance, the human genome corresponds to 3 billion base pairs (bp) of the DNA double helix, two copies of which make up two meters of DNA chains that have to be stored within the tiny micron-sized nucleus of each cell. These two ...
NOBEL LECTURE: Yeast and Cancer
NOBEL LECTURE: Yeast and Cancer

... DNA synthesis, nuclear division cytokinesis and cell division. The event that stopped first after a shift from the permissive to the restrictive temperature was considered the primary defect. After the primary defect, other cell cycle events would occur or not depending upon the particular mutant. E ...
The DNA Damage Response Signaling Cascade
The DNA Damage Response Signaling Cascade

... Chk1 activation in U. maydis is that there are two main signals to be detected by DNA surveillance systems: DNA double-strand breaks (induced here by phleomycin treatment) and singlestrand DNA tracts as a hallmark of replication stress (caused by HU treatment). We challenged cultures of wild-type an ...
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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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