Chromatin meets the cell cycle
... eukaryotes, and all of these proteins have homologues in plant genomes (Clapier and Cairns, 2009). Chromatin remodellers alter chromatin structure in various way: they can promote nucleosome sliding, ejection, or unwrapping and facilitate the exchange of histone variants (Clapier and Cairns, 2009). ...
... eukaryotes, and all of these proteins have homologues in plant genomes (Clapier and Cairns, 2009). Chromatin remodellers alter chromatin structure in various way: they can promote nucleosome sliding, ejection, or unwrapping and facilitate the exchange of histone variants (Clapier and Cairns, 2009). ...
Introduction to Biology - Phillips Scientific Methods
... a ring. Although centrioles may help organize microtubule assembly, they are not essential for this function in all eukaryotes (centrosomes of most plants lack centrioles entirely). b. Cilia and flagella – are extensions of eukaryotic cells, and are composed of, and move by, microtubules. Cilia are ...
... a ring. Although centrioles may help organize microtubule assembly, they are not essential for this function in all eukaryotes (centrosomes of most plants lack centrioles entirely). b. Cilia and flagella – are extensions of eukaryotic cells, and are composed of, and move by, microtubules. Cilia are ...
Nature Rev.Mol.Cell Biol. 16
... Each layer of chromatin organization reflects aspects of gene regulation ...
... Each layer of chromatin organization reflects aspects of gene regulation ...
GCE AS/A Level 2400U10-1 – NEW AS BIOLOGY – Unit 1
... 6. Pyrophosphatase is an enzyme found inside the nucleus of cells and is involved in DNA replication. The enzyme catalyses the conversion of a molecule of pyrophosphate to two phosphate ions. The diagrams below show the enzyme pyrophosphatase and its substrate pyrophosphate. Molecules of phenylalan ...
... 6. Pyrophosphatase is an enzyme found inside the nucleus of cells and is involved in DNA replication. The enzyme catalyses the conversion of a molecule of pyrophosphate to two phosphate ions. The diagrams below show the enzyme pyrophosphatase and its substrate pyrophosphate. Molecules of phenylalan ...
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... reports of single cases or small series of patient with BCCs on sites other than the scrotum, a significant relationship between HPV and BCCs in the general population has yet to be established. ...
... reports of single cases or small series of patient with BCCs on sites other than the scrotum, a significant relationship between HPV and BCCs in the general population has yet to be established. ...
Living Cells: Structure, Function and Diversity”
... The nucleus contains the cell's DNA, organised into chromosomes, varying from to several hundred per cell. When the cell is not dividing (during interphase), the DNA is usually dispersed. Prior to mitosis, this dispersed DNA, called chromatin, condenses into individual chromosomes. In a few cells (e ...
... The nucleus contains the cell's DNA, organised into chromosomes, varying from to several hundred per cell. When the cell is not dividing (during interphase), the DNA is usually dispersed. Prior to mitosis, this dispersed DNA, called chromatin, condenses into individual chromosomes. In a few cells (e ...
Chapter 1 The Study of Life/ Chapter 2
... 12. Identify the parts of a microscope and demonstrate how to use it to find microscopic objects ...
... 12. Identify the parts of a microscope and demonstrate how to use it to find microscopic objects ...
Slide 1
... believed to derived from apocrine sweat glands or, less often, from eccrine sweat glands. It is an exceedingly rare neoplasm, appearing at birth or arising during infancy, around the time of puberty, or later in life. Three clinical types have been described : The linear type is usually seen on the ...
... believed to derived from apocrine sweat glands or, less often, from eccrine sweat glands. It is an exceedingly rare neoplasm, appearing at birth or arising during infancy, around the time of puberty, or later in life. Three clinical types have been described : The linear type is usually seen on the ...
Get PDF - Wiley Online Library
... mediated by the same type of mechanism or by a more general membrane perturbation. While these questions about the mechanism will be investigated in follow-up studies, our controls clearly demonstrate that cell death only occurs in the combined presence of a pore and a hydrophobic belt, strongly sug ...
... mediated by the same type of mechanism or by a more general membrane perturbation. While these questions about the mechanism will be investigated in follow-up studies, our controls clearly demonstrate that cell death only occurs in the combined presence of a pore and a hydrophobic belt, strongly sug ...
T. brucei basal body component - Journal of Cell Science
... generate a fusion protein containing a GST (glutathione S transferase) domain linked to amino acids 457 to 1215 of TBBC. This fusion protein was purified by preparative electrophoresis and injected into rabbits to generate specific antisera. The same fusion protein was also injected into the footpad ...
... generate a fusion protein containing a GST (glutathione S transferase) domain linked to amino acids 457 to 1215 of TBBC. This fusion protein was purified by preparative electrophoresis and injected into rabbits to generate specific antisera. The same fusion protein was also injected into the footpad ...
Carbon metabolism in Chlamydomonas: inositol
... type cells, which typically only exhibit lipid produced question marks are possibilities that were not directly tested. TOR and the InsPs produced by VIP1 synerg accumulation and stimulate cell growth. Black TAG accumulation (repression bar) and promote cell growth (arrow). bodies under nitrogen-sta ...
... type cells, which typically only exhibit lipid produced question marks are possibilities that were not directly tested. TOR and the InsPs produced by VIP1 synerg accumulation and stimulate cell growth. Black TAG accumulation (repression bar) and promote cell growth (arrow). bodies under nitrogen-sta ...
Inheritance of biological information
... on cell biology testify.2 However, the more we study cells, the more we discover of their complexity. There seems to be, as yet, no end to their astonishingly intricate designs. Not only are they intricate and complex, they are amazingly fast and accurate in what they do. For example, the enzyme car ...
... on cell biology testify.2 However, the more we study cells, the more we discover of their complexity. There seems to be, as yet, no end to their astonishingly intricate designs. Not only are they intricate and complex, they are amazingly fast and accurate in what they do. For example, the enzyme car ...
Intracellular-volume measurements of wheat
... protoplasts under illuminating and non-illuminating conditions. Uptake of T P M P + , which will accumulate in cell compartments which have an inside negative relative to the outside, has been compared with that seen for 8hRb+,a cation which will equilibrate specifically across the plasma membrane. ...
... protoplasts under illuminating and non-illuminating conditions. Uptake of T P M P + , which will accumulate in cell compartments which have an inside negative relative to the outside, has been compared with that seen for 8hRb+,a cation which will equilibrate specifically across the plasma membrane. ...
File
... cell walls for structure and support. • 5. Yes. My plant cell drawing included a cell wall and some chloroplasts (depending on slide) and my animal cell drawings lacked both of these. ...
... cell walls for structure and support. • 5. Yes. My plant cell drawing included a cell wall and some chloroplasts (depending on slide) and my animal cell drawings lacked both of these. ...
Normal and c-Myc-promoted human keratinocyte di
... self-renewal (Lavker and Sun, 1983; Hall and Watt, 1989). After division their progeny stays as stem cells or enter an intermediate state, the transit amplifying cell, which proliferates continuously but undergoes terminal dierentiation after a small number of cell divisions. Although little is kno ...
... self-renewal (Lavker and Sun, 1983; Hall and Watt, 1989). After division their progeny stays as stem cells or enter an intermediate state, the transit amplifying cell, which proliferates continuously but undergoes terminal dierentiation after a small number of cell divisions. Although little is kno ...
Preview Sample 1
... Answer: One-half of the offspring will be expected to have Down syndrome because of 2 X 1 segregation of chromosome #21 at anaphase I. 12) Normal diploid somatic (body) cells of the mosquito Culex pipiens contain six chromosomes. Assign the symbols AmAp, BmBp, and CmCp to the three homologous chromo ...
... Answer: One-half of the offspring will be expected to have Down syndrome because of 2 X 1 segregation of chromosome #21 at anaphase I. 12) Normal diploid somatic (body) cells of the mosquito Culex pipiens contain six chromosomes. Assign the symbols AmAp, BmBp, and CmCp to the three homologous chromo ...
The Plant Endomembrane System—A Complex
... The levels and distribution of the plant hormone auxin are critical in regulating multiple developmental processes in plants (Mockaitis and Estelle 2008, Vanneste and Friml 2009). Auxin transporters of the PIN-FORMED (PIN) family localize asymmetrically at the PM and mediate directional intercellula ...
... The levels and distribution of the plant hormone auxin are critical in regulating multiple developmental processes in plants (Mockaitis and Estelle 2008, Vanneste and Friml 2009). Auxin transporters of the PIN-FORMED (PIN) family localize asymmetrically at the PM and mediate directional intercellula ...
Essential embryonic roles of the CKI-1 cyclin
... cycle arrest, morphogenesis and differentiation, and suppression of programmed cell death. The vertebrate Cip/Kip CKIs have been shown to directly inhibit the activity of cyclin/cyclin-dependent kinase (cdk) complexes that control G1/S progression, leading to G1 arrest (Sherr and Roberts, 1995). The ...
... cycle arrest, morphogenesis and differentiation, and suppression of programmed cell death. The vertebrate Cip/Kip CKIs have been shown to directly inhibit the activity of cyclin/cyclin-dependent kinase (cdk) complexes that control G1/S progression, leading to G1 arrest (Sherr and Roberts, 1995). The ...
Embryological variation during nematode development
... description of C. elegans embryogenesis on a cell-by-cell basis (Sulston et al., 1983) revealed that it is very similar to Ascaris and gave proof that the old assumption was correct. More recent analysis of nematodes embryogenesis in different clades uncovered that the order of early cleavages can v ...
... description of C. elegans embryogenesis on a cell-by-cell basis (Sulston et al., 1983) revealed that it is very similar to Ascaris and gave proof that the old assumption was correct. More recent analysis of nematodes embryogenesis in different clades uncovered that the order of early cleavages can v ...
Specific Aim:
... they sustain mutations. DNA is not a smooth, continuous process, but proceeds in spurts, pausing occasionally as lagging-strand synthesis catches up with leading-strand. It is during these stalls that DNA polymerases are most prone to make a mistake that will lead to mutations in the DNA. Recent evi ...
... they sustain mutations. DNA is not a smooth, continuous process, but proceeds in spurts, pausing occasionally as lagging-strand synthesis catches up with leading-strand. It is during these stalls that DNA polymerases are most prone to make a mistake that will lead to mutations in the DNA. Recent evi ...
Cell cycle
The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication (replication) that produces two daughter cells. In prokaryotes which lack a cell nucleus, the cell cycle occurs via a process termed binary fission. In cells with a nucleus, as in eukaryotes, the cell cycle can be divided into three periods: interphase, the mitotic (M) phase, and cytokinesis. During interphase, the cell grows, accumulating nutrients needed for mitosis, preparing it for cell division and duplicating its DNA. During the mitotic phase, the cell splits itself into two distinct daughter cells. During the final stage, cytokinesis, the new cell is completely divided. To ensure the proper division of the cell, there are control mechanisms known as cell cycle checkpoints.The cell-division cycle is a vital process by which a single-celled fertilized egg develops into a mature organism, as well as the process by which hair, skin, blood cells, and some internal organs are renewed. After cell division, each of the daughter cells begin the interphase of a new cycle. Although the various stages of interphase are not usually morphologically distinguishable, each phase of the cell cycle has a distinct set of specialized biochemical processes that prepare the cell for initiation of cell division.