Nuclear Envelope Breakdown Proceeds by
... 2000), and together with in vivo observations suggest that the nuclear periphery is a highly crosslinked and stable protein network (Daigle et al., 2001). In dividing cells, this network is abolished during NE breakdown (NEBD), which defines the transition from prophase to prometaphase in the cell d ...
... 2000), and together with in vivo observations suggest that the nuclear periphery is a highly crosslinked and stable protein network (Daigle et al., 2001). In dividing cells, this network is abolished during NE breakdown (NEBD), which defines the transition from prophase to prometaphase in the cell d ...
From cellulose to cell
... microtubules have rotated their orientation so that they are parallel to the wound surface, which is more-or-less orthogonal to the long axis of the root (Fig. 2). This is accompanied by elongation of the cells towards the wound, suggesting that the cellulose is being laid down in the new direction. ...
... microtubules have rotated their orientation so that they are parallel to the wound surface, which is more-or-less orthogonal to the long axis of the root (Fig. 2). This is accompanied by elongation of the cells towards the wound, suggesting that the cellulose is being laid down in the new direction. ...
The Plant Secretory Pathway: An Essential
... member of the diversified SNARE subfamilies has been suggested to have a specific role during development and stress conditions as well as a possible redundant function (Sanderfoot 2007). One of the most enigmatic SNAREs in plant cells is SYP61, which is a Qc-SNARE found in the AtVPS45 complexes in ...
... member of the diversified SNARE subfamilies has been suggested to have a specific role during development and stress conditions as well as a possible redundant function (Sanderfoot 2007). One of the most enigmatic SNAREs in plant cells is SYP61, which is a Qc-SNARE found in the AtVPS45 complexes in ...
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... neural tube abnormalities. However, the delay in neuroepithelial convergence that we observe in hoxb1b mutants is milder than in PCP mutants and occurs later than the convergence defect of PCP mutants (Ciruna et al., 2006; Tawk et al., 2007). To address directly the role of Hoxb1b in regulating PCP, ...
... neural tube abnormalities. However, the delay in neuroepithelial convergence that we observe in hoxb1b mutants is milder than in PCP mutants and occurs later than the convergence defect of PCP mutants (Ciruna et al., 2006; Tawk et al., 2007). To address directly the role of Hoxb1b in regulating PCP, ...
Essential embryonic roles of the CKI-1 cyclin
... We find that mutants in which both of the adjacent cki-1 and cki-2 genes are deleted show widespread embryonic hyperplasia in many tissue types, accumulation of excessive numbers of programmed cell death corpses, and profound defects in morphogenesis of the body and the feeding organ, the pharynx. I ...
... We find that mutants in which both of the adjacent cki-1 and cki-2 genes are deleted show widespread embryonic hyperplasia in many tissue types, accumulation of excessive numbers of programmed cell death corpses, and profound defects in morphogenesis of the body and the feeding organ, the pharynx. I ...
``Self-Assisted`` Amoeboid Navigation in Complex Environments
... cell types. Consequently, the cell polarizes and different chemicals accumulate at the front versus the back of the cell. Motility is typically obtained by f-actin polymerization at the cell’s front, leading to membrane protrusions such as pseudopods, lamellipods and ruffles. Beyond individual propu ...
... cell types. Consequently, the cell polarizes and different chemicals accumulate at the front versus the back of the cell. Motility is typically obtained by f-actin polymerization at the cell’s front, leading to membrane protrusions such as pseudopods, lamellipods and ruffles. Beyond individual propu ...
Nuclear envelope dynamics during plant cell division suggest
... disassemble at the beginning of mitosis in Apium graveolens cells, but are distributed and reassemble differently [7]. The NMCP1 associates with the mitotic spindle, whereas NMCP2 is present in the mitotic cytoplasm and assembles later at the reforming NE than NMCP1 [7]. Whether NMCP1 and 2 function ...
... disassemble at the beginning of mitosis in Apium graveolens cells, but are distributed and reassemble differently [7]. The NMCP1 associates with the mitotic spindle, whereas NMCP2 is present in the mitotic cytoplasm and assembles later at the reforming NE than NMCP1 [7]. Whether NMCP1 and 2 function ...
synchronous pollen mitosis and the formation of the generative cell
... the numerous nuclei within the massula. All will differ in consequence of gene segregation, but again because of compensation the differences cannot be expressed in functions located in the cytoplasm. This implies that haploid incompatibility systems would be unworkable; and indeed no self-incompati ...
... the numerous nuclei within the massula. All will differ in consequence of gene segregation, but again because of compensation the differences cannot be expressed in functions located in the cytoplasm. This implies that haploid incompatibility systems would be unworkable; and indeed no self-incompati ...
Rab13 regulates PKA signaling during tight junction assembly
... in vitro are concordant with those in vivo and demonstrate that Rab13 is able to inhibit PKA activity. In this paper, we identified PKA as a new effector for the small GTPase Rab13. Our data demonstrate that the GTP bound form of Rab13 directly binds and negatively controls PKA activity both in vitr ...
... in vitro are concordant with those in vivo and demonstrate that Rab13 is able to inhibit PKA activity. In this paper, we identified PKA as a new effector for the small GTPase Rab13. Our data demonstrate that the GTP bound form of Rab13 directly binds and negatively controls PKA activity both in vitr ...
Characterizing and optimizing magnetosome production of
... A total of 11 factors were determined by single factor experiments by cell growth and magnetosome content. Their influences on magnetite production, productivity and coercivity were scanned using a Plackett–Burman design (Tables S1 and S2, Supporting Information). High coercivity values usually indi ...
... A total of 11 factors were determined by single factor experiments by cell growth and magnetosome content. Their influences on magnetite production, productivity and coercivity were scanned using a Plackett–Burman design (Tables S1 and S2, Supporting Information). High coercivity values usually indi ...
Dynamics of the Plant Nuclear Envelope and
... Several proteins with significant similarity to animal and yeast Nups have been identified in forward genetic screens for diverse pathways. In addition, reverse genetic approaches with Nup homologs have been performed (Zhang and Li, 2005; Dong et al., 2006; Kanamori et al., 2006; Jacob et al., 2007; ...
... Several proteins with significant similarity to animal and yeast Nups have been identified in forward genetic screens for diverse pathways. In addition, reverse genetic approaches with Nup homologs have been performed (Zhang and Li, 2005; Dong et al., 2006; Kanamori et al., 2006; Jacob et al., 2007; ...
The evolution of meiosis and sexual reproduction
... On the present evidence, a more likely hypothesis than that of Darlington (1958) is that the ancestral eukaryotes had some form of parasexual reproduction and were also able to carry out genetic recombination. Such organisms would be able to carry out processes (2)-(8) as listed in the Introduction. ...
... On the present evidence, a more likely hypothesis than that of Darlington (1958) is that the ancestral eukaryotes had some form of parasexual reproduction and were also able to carry out genetic recombination. Such organisms would be able to carry out processes (2)-(8) as listed in the Introduction. ...
7-2 Eukaryotic Cell Structure
... There are two types of ER—rough and smooth. The portion of the ER involved in protein synthesis is called rough endoplasmic reticulum, or rough ER. Ribosomes are found on the surface of rough ER. Rough ER is abundant in cells that produce large amounts of protein for export. ...
... There are two types of ER—rough and smooth. The portion of the ER involved in protein synthesis is called rough endoplasmic reticulum, or rough ER. Ribosomes are found on the surface of rough ER. Rough ER is abundant in cells that produce large amounts of protein for export. ...
7-2 Eukaryotic Cell Structure
... There are two types of ER—rough and smooth. The portion of the ER involved in protein synthesis is called rough endoplasmic reticulum, or rough ER. Ribosomes are found on the surface of rough ER. Rough ER is abundant in cells that produce large amounts of protein for export. ...
... There are two types of ER—rough and smooth. The portion of the ER involved in protein synthesis is called rough endoplasmic reticulum, or rough ER. Ribosomes are found on the surface of rough ER. Rough ER is abundant in cells that produce large amounts of protein for export. ...
7-2 Eukaryotic Cell Structure
... There are two types of ER—rough and smooth. The portion of the ER involved in protein synthesis is called rough endoplasmic reticulum, or rough ER. Ribosomes are found on the surface of rough ER. Rough ER is abundant in cells that produce large amounts of protein for export. ...
... There are two types of ER—rough and smooth. The portion of the ER involved in protein synthesis is called rough endoplasmic reticulum, or rough ER. Ribosomes are found on the surface of rough ER. Rough ER is abundant in cells that produce large amounts of protein for export. ...
Mycoplasma
... spontaneously to variants that can replicate in the form of small filterable protoplasmic elements with defective or absent cell walls. These organisms, called L-forms, can also be formed by many species when cell wall synthesis is impaired by antibiotic treatment or high salt concentration. ...
... spontaneously to variants that can replicate in the form of small filterable protoplasmic elements with defective or absent cell walls. These organisms, called L-forms, can also be formed by many species when cell wall synthesis is impaired by antibiotic treatment or high salt concentration. ...
7-2 Eukaryotic Cell Structure
... Eukaryotic cells are given their shape and internal organization by the cytoskeleton. ...
... Eukaryotic cells are given their shape and internal organization by the cytoskeleton. ...
Section 2
... Eukaryotic cells are given their shape and internal organization by the cytoskeleton. ...
... Eukaryotic cells are given their shape and internal organization by the cytoskeleton. ...
7-2 Eukaryotic Cell Structure
... Eukaryotic cells are given their shape and internal organization by the cytoskeleton. ...
... Eukaryotic cells are given their shape and internal organization by the cytoskeleton. ...
Live-cell mass profiling: an emerging approach in
... resolution of resonator frequency and, therefore, of cell mass). A breakthrough in the microfabricated resonator approach for cell mass measurement was the placement of the cell and cell culture medium inside a fluid microchannel through a silicon cantilever suspended in a vacuum (Fig. 1a). Single c ...
... resolution of resonator frequency and, therefore, of cell mass). A breakthrough in the microfabricated resonator approach for cell mass measurement was the placement of the cell and cell culture medium inside a fluid microchannel through a silicon cantilever suspended in a vacuum (Fig. 1a). Single c ...
S1 Topic 8 The Basic Structure of a Cell
... students understand the meanings. Where necessary, further diagrams should be used as illustration. ...
... students understand the meanings. Where necessary, further diagrams should be used as illustration. ...
Biggins
... much less Mps1p relative to metaphase-arrested cells (data not shown). Taken together, these data suggest that Ipl1p is required for full maintenance of the GAL-MPS1 checkpoint arrest and that Mps1 protein levels decline as cells exit mitosis. Mutations that completely abolish kinetochore function d ...
... much less Mps1p relative to metaphase-arrested cells (data not shown). Taken together, these data suggest that Ipl1p is required for full maintenance of the GAL-MPS1 checkpoint arrest and that Mps1 protein levels decline as cells exit mitosis. Mutations that completely abolish kinetochore function d ...
CH # 7-3
... A considerable portion of the energy used by cells in their daily activities is devoted to providing the energy to keep this form of active transport working. The use of energy in these systems enables cells to concentrate substances in a particular location, even when the forces of diffusion might ...
... A considerable portion of the energy used by cells in their daily activities is devoted to providing the energy to keep this form of active transport working. The use of energy in these systems enables cells to concentrate substances in a particular location, even when the forces of diffusion might ...
7.3 Cell Transport - Mountain Range High School
... A considerable portion of the energy used by cells in their daily activities is devoted to providing the energy to keep this form of active transport working. The use of energy in these systems enables cells to concentrate substances in a particular location, even when the forces of diffusion might ...
... A considerable portion of the energy used by cells in their daily activities is devoted to providing the energy to keep this form of active transport working. The use of energy in these systems enables cells to concentrate substances in a particular location, even when the forces of diffusion might ...
Biochemical switches in the cell cycle
A series of biochemical switches control transitions between and within the various phases of the cell cycle. The cell cycle is a series of complex, ordered, sequential events that control how a single cell divides into two cells, and involves several different phases. The phases include the G1 and G2 phases, DNA replication or S phase, and the actual process of cell division, mitosis or M phase. During the M phase, the chromosomes separate and cytokinesis occurs.The switches maintain the orderly progression of the cell cycle and act as checkpoints to ensure that each phase has been properly completed before progression to the next phase. For example, Cdk, or cyclin dependent kinase, is a major control switch for the cell cycle and it allows the cell to move from G1 to S or G2 to M by adding phosphate to protein substrates. Such multi-component (involving multiple inter-linked proteins) switches have been shown to generate decisive, robust (and potentially irreversible) transitions and trigger stable oscillations. As a result, they are a subject of active research that tries to understand how such complex properties are wired into biological control systems.