Stem Cell - Active Motif
... The two hallmark features of stem cells are pluripotency, the ability to differentiate into any mature cell type, and self-renewal, the capacity to undergo indefinite replicative cycles without losing stem cell identity. The general types of stem cells include embryonic stem cells (ESCs), adult stem ...
... The two hallmark features of stem cells are pluripotency, the ability to differentiate into any mature cell type, and self-renewal, the capacity to undergo indefinite replicative cycles without losing stem cell identity. The general types of stem cells include embryonic stem cells (ESCs), adult stem ...
STAINING OF BACTERIAL CELLS Objective • To learn the
... the dye complex to a cellular component represents the staining reaction. Depending upon the dye, the chromophore can be either positively charged (cationic) and have an affinity for negative ions or negatively charged (anionic) with an affinity for positive ions. Bacteria carry a net negative charg ...
... the dye complex to a cellular component represents the staining reaction. Depending upon the dye, the chromophore can be either positively charged (cationic) and have an affinity for negative ions or negatively charged (anionic) with an affinity for positive ions. Bacteria carry a net negative charg ...
New Insights on Plant Cell Elongation: A Role for Acetylcholine
... medium (data not shown); maximum elongation after 16 h was observed in hypocotyl segments treated with auxin alone. Our observation differs from Lawson and colleagues [38], who reported that higher concentration of ACh had an inhibitory effect on elongation. In any case, the literature does not prov ...
... medium (data not shown); maximum elongation after 16 h was observed in hypocotyl segments treated with auxin alone. Our observation differs from Lawson and colleagues [38], who reported that higher concentration of ACh had an inhibitory effect on elongation. In any case, the literature does not prov ...
K-ras modulates the cell cycle via both positive and negative
... problem associated with stable transfections using noninducible expression vectors, MCF-7 cells were cloned and cells from a single clone (#2) (which harbors normal ras genes as determined by sequencing analysis (data not shown)) were used to obtain stable transfectants expressing inducible human ac ...
... problem associated with stable transfections using noninducible expression vectors, MCF-7 cells were cloned and cells from a single clone (#2) (which harbors normal ras genes as determined by sequencing analysis (data not shown)) were used to obtain stable transfectants expressing inducible human ac ...
The Cell Membrane
... instructions within chromosomes. The instructions tell how to synthesize the proteins that determine cell structure and function. Chromosomes also contain various proteins that control expression of the genetic information. ...
... instructions within chromosomes. The instructions tell how to synthesize the proteins that determine cell structure and function. Chromosomes also contain various proteins that control expression of the genetic information. ...
Growth rate regulation of lac operon expression in Escherichia coli
... also studied in continuous culture [20]. The results of placlacZ expression were still shown to be growth rate regulated (Fig. 3B). Therefore, growth rate regulation of lac operon expression was also independent of its position on the chromosome. 3.2. E¡ect of the cya and crp mutations on plac-lacZ ...
... also studied in continuous culture [20]. The results of placlacZ expression were still shown to be growth rate regulated (Fig. 3B). Therefore, growth rate regulation of lac operon expression was also independent of its position on the chromosome. 3.2. E¡ect of the cya and crp mutations on plac-lacZ ...
Text - Enlighten: Publications
... plant cells. This is due to the exceptionally fragile nature of the hairs, especially when handling during experimental manipulation, and the difficulty in obtaining sufficient amounts of root hair wall material for biochemical studies. Presently, it is thought that cellulose microfibril arrangement ...
... plant cells. This is due to the exceptionally fragile nature of the hairs, especially when handling during experimental manipulation, and the difficulty in obtaining sufficient amounts of root hair wall material for biochemical studies. Presently, it is thought that cellulose microfibril arrangement ...
Multipotency and Tissue-Specific Stem Cells
... while only a small fraction can be extracted from the skin basal layer or the interfollicular space. Studies that followed, asserted that upon wound healing, both stem cells in the epidermal basal layer and in the bulge, contributed to skin regeneration. However, only progeny of the former contribut ...
... while only a small fraction can be extracted from the skin basal layer or the interfollicular space. Studies that followed, asserted that upon wound healing, both stem cells in the epidermal basal layer and in the bulge, contributed to skin regeneration. However, only progeny of the former contribut ...
A metabolic perspective of Peto`s paradox and cancer
... If one were to assume that it is true that larger animals have relatively lower rates of cancer burden compared with smaller mammals, could metabolic rates that scale with body size be associated with the propensity for tumorigenesis? The correlation of animal body size with basal metabolic rates ha ...
... If one were to assume that it is true that larger animals have relatively lower rates of cancer burden compared with smaller mammals, could metabolic rates that scale with body size be associated with the propensity for tumorigenesis? The correlation of animal body size with basal metabolic rates ha ...
The Putative Arabidopsis Arp2/3 Complex
... the leading edge of migrating animal cells (Welch et al., 1997a; Morrell et al., 1999; Schaerer-Brodbeck and Riezman, 2000a, 2000b; Higgs and Pollard, 2001). As a multifunctional organizer, the cellular roles of the Arp2/3 complex involve the control of actin polymerization nucleation for many cell ...
... the leading edge of migrating animal cells (Welch et al., 1997a; Morrell et al., 1999; Schaerer-Brodbeck and Riezman, 2000a, 2000b; Higgs and Pollard, 2001). As a multifunctional organizer, the cellular roles of the Arp2/3 complex involve the control of actin polymerization nucleation for many cell ...
Embryonic stem cells assume a primitive neural stem cell fate in the
... Stern, 2004). However, it is uncertain how complete the BMP inhibition was in these studies, and it is possible that the activity of individual BMPs was insufficiently suppressed to allow neuralization to occur (and/or that some BMP subtypes or other neural inhibitors escaped blockade). It has also ...
... Stern, 2004). However, it is uncertain how complete the BMP inhibition was in these studies, and it is possible that the activity of individual BMPs was insufficiently suppressed to allow neuralization to occur (and/or that some BMP subtypes or other neural inhibitors escaped blockade). It has also ...
Modeling the Gastric Mill Central Pattern Generator of the Lobster
... Modeling To investigate the essential mechanisms underlying pattern generation by mathematical modeling, one has to first address the question of what level of modeling to use. Ideally the model should be a simplification of the numerous biophysical events taking place, whereas at the same time it s ...
... Modeling To investigate the essential mechanisms underlying pattern generation by mathematical modeling, one has to first address the question of what level of modeling to use. Ideally the model should be a simplification of the numerous biophysical events taking place, whereas at the same time it s ...
Cnidarians: An evolutionarily conserved model system for
... 1984). An important consequence is that the passively displaced cells have to assess their relative position in the organism continuously. Hence, patterning systems necessary to provide this information are continuously active in Hydra polyps. By contrast, in mammals, most of these morphogenetic sig ...
... 1984). An important consequence is that the passively displaced cells have to assess their relative position in the organism continuously. Hence, patterning systems necessary to provide this information are continuously active in Hydra polyps. By contrast, in mammals, most of these morphogenetic sig ...
Uptake and presentation of hepatitis C virus–like
... cells (DCs) play a key role in the induction and maintenance of antiviral T-cell immune responses. As antigen-presenting cells, DCs capture antigens, process them into peptides, and present them on molecules of the major histocompatibility complex (MHC) to T cells.7,8 A pathway by which DCs internal ...
... cells (DCs) play a key role in the induction and maintenance of antiviral T-cell immune responses. As antigen-presenting cells, DCs capture antigens, process them into peptides, and present them on molecules of the major histocompatibility complex (MHC) to T cells.7,8 A pathway by which DCs internal ...
The cell walls of streptococci
... The methods developed by Salton (1953)made possible the study of the cell-wall composition as a relatively simple procedure and recent work by others has suggested that cell-wall composition may be of use in classifying streptococci (Roberts & Stewart, 1961 ; Slade & Slamp, 1962). As part of a gener ...
... The methods developed by Salton (1953)made possible the study of the cell-wall composition as a relatively simple procedure and recent work by others has suggested that cell-wall composition may be of use in classifying streptococci (Roberts & Stewart, 1961 ; Slade & Slamp, 1962). As part of a gener ...
Heat shock results in cell cycle delay and synchronisation of mitotic
... in transformed flies. Edgar and O’Farrell (1990) showed that when this promoter was used to drive the ectopic expression of the cell cycle regulatory gene string (stg), mitosis no longer occurred in domains, but cells entered mitosis throughout the embryo. Neither this study, nor that of Lehner et a ...
... in transformed flies. Edgar and O’Farrell (1990) showed that when this promoter was used to drive the ectopic expression of the cell cycle regulatory gene string (stg), mitosis no longer occurred in domains, but cells entered mitosis throughout the embryo. Neither this study, nor that of Lehner et a ...
Using monoclonal antibodies to label living root hairs: a novel tool
... plant cells. This is due to the exceptionally fragile nature of the hairs, especially when handling during experimental manipulation, and the difficulty in obtaining sufficient amounts of root hair wall material for biochemical studies. Presently, it is thought that cellulose microfibril arrangement ...
... plant cells. This is due to the exceptionally fragile nature of the hairs, especially when handling during experimental manipulation, and the difficulty in obtaining sufficient amounts of root hair wall material for biochemical studies. Presently, it is thought that cellulose microfibril arrangement ...
A Definitive, Rapid Alternative to the Gram Stain Assay
... tested with the PTS™ Gram ID for accuracy and specificity. These organisms have been grown for up to 72 hours and successfully tested, which could mean less sub-culturing of organisms for the microbiologist. The Gram ID assay is run on the same PTS™ instrument that is currently being used for endoto ...
... tested with the PTS™ Gram ID for accuracy and specificity. These organisms have been grown for up to 72 hours and successfully tested, which could mean less sub-culturing of organisms for the microbiologist. The Gram ID assay is run on the same PTS™ instrument that is currently being used for endoto ...
Mapping the Synthetic Dosage Lethality Network of CDK1/CDC28
... essential for maintaining cell viability under conditions of reduced Cdc28 activity, and revealed several cellular processes that were not previously known to affect the cell cycle (Zimmermann et al. 2011). Follow-up studies revealed novel functions of Cdc28; for instance, we have shown that Cdc28 h ...
... essential for maintaining cell viability under conditions of reduced Cdc28 activity, and revealed several cellular processes that were not previously known to affect the cell cycle (Zimmermann et al. 2011). Follow-up studies revealed novel functions of Cdc28; for instance, we have shown that Cdc28 h ...
BETA LACTAM ANTIBIOTICS AND OTHER INHIBITORS OF CELL
... Gram-negative Bacterial Membrane Structure • Gram-negative bacteria are surrounded by two membranes. • The outer membrane functions as an efficient permeability barrier containing lipopolysaccharides (LPS) and porins. ...
... Gram-negative Bacterial Membrane Structure • Gram-negative bacteria are surrounded by two membranes. • The outer membrane functions as an efficient permeability barrier containing lipopolysaccharides (LPS) and porins. ...