Cell Wall Amine Oxidases: New Players in Root Xylem
... act through stabilization of negatively-charged intracellular macromolecules, such as proteins, nucleic acids and phospholipids. However, besides their biophysical effects, these molecules may be involved in signal transduction pathways during developmentally-controlled programs or stress-induced re ...
... act through stabilization of negatively-charged intracellular macromolecules, such as proteins, nucleic acids and phospholipids. However, besides their biophysical effects, these molecules may be involved in signal transduction pathways during developmentally-controlled programs or stress-induced re ...
A Mechanism Linking Extra Centrosomes to Chromosomal Instability
... sorting to isolate pure populations of tetraploid cells with a normal complement of centrosomes. Fluorescence in situ hybridization (FISH) and karyotyping demonstrated that these cells contained a tetraploid complement of chromosomes (Fig. 3b, Supp. Fig. 5). Consequently, this procedure generated pu ...
... sorting to isolate pure populations of tetraploid cells with a normal complement of centrosomes. Fluorescence in situ hybridization (FISH) and karyotyping demonstrated that these cells contained a tetraploid complement of chromosomes (Fig. 3b, Supp. Fig. 5). Consequently, this procedure generated pu ...
Cell Membrane - holyoke
... molecules can pass through the cellular membrane by a process called diffusion. Other molecules are too large to pass through the membrane and must be helped across the lipid bilayer. ...
... molecules can pass through the cellular membrane by a process called diffusion. Other molecules are too large to pass through the membrane and must be helped across the lipid bilayer. ...
10–2 Cell Division
... Materials move through cells by diffusion. Oxygen and food move into cells, while waste products move out of cells. How does the size of a cell affect how efficiently materials get to all parts of a cell? Work with a partner to complete this activity. 1. On a sheet of paper, make a drawing of a cell ...
... Materials move through cells by diffusion. Oxygen and food move into cells, while waste products move out of cells. How does the size of a cell affect how efficiently materials get to all parts of a cell? Work with a partner to complete this activity. 1. On a sheet of paper, make a drawing of a cell ...
Isolation of a novel population of multipotent stem cells
... isolated due to advances in molecular and cellular biology (Cotsarelis, 2006). It was predicted by several authors that epithelial stem cells have been definitively addressed through new techniques. We know that cells are generated through proliferation that occurs only at the basal layer therefore ...
... isolated due to advances in molecular and cellular biology (Cotsarelis, 2006). It was predicted by several authors that epithelial stem cells have been definitively addressed through new techniques. We know that cells are generated through proliferation that occurs only at the basal layer therefore ...
Role of plectin in cytoskeleton organization and dynamics
... properties and mechanical strength of cells, organize and give structure to their interior, and control many dynamic processes, such as intracellular trafficking, cell division, adhesion, and locomotion. Actin/myosin filaments, microtubules, and intermediate filaments, the three major protein fiber ...
... properties and mechanical strength of cells, organize and give structure to their interior, and control many dynamic processes, such as intracellular trafficking, cell division, adhesion, and locomotion. Actin/myosin filaments, microtubules, and intermediate filaments, the three major protein fiber ...
A majority of cotton genes are expressed in single-celled
... maturity, each initiating its developmental program from undifferentiated progenitor cells (Honys and Twell 2004; Galbraith and Birnbaum 2006). In plants, it has been estimated that there are approximately 40 different cell types, each with their own function, structure, and location (Demura et al. ...
... maturity, each initiating its developmental program from undifferentiated progenitor cells (Honys and Twell 2004; Galbraith and Birnbaum 2006). In plants, it has been estimated that there are approximately 40 different cell types, each with their own function, structure, and location (Demura et al. ...
Common Docking Domain in Progesterone Receptor
... represses transcription of PR target genes, either directly through DNA binding to progesterone response elements (PREs) or indirectly through tethering interactions with other transcription factors (AP1, SP1, STATs) (6–9). PR-mediated regulation of gene expression is controlled by many posttranslat ...
... represses transcription of PR target genes, either directly through DNA binding to progesterone response elements (PREs) or indirectly through tethering interactions with other transcription factors (AP1, SP1, STATs) (6–9). PR-mediated regulation of gene expression is controlled by many posttranslat ...
18. plant growth - Development of e
... Growth is defined as a vital process that brings about a permanent and irreversible change in any plant or its part in respect to its size, form, weight and volume. Growth is restricted only to living cells and is accomplished by metabolic processes involving synthesize of macromolecules, such as nu ...
... Growth is defined as a vital process that brings about a permanent and irreversible change in any plant or its part in respect to its size, form, weight and volume. Growth is restricted only to living cells and is accomplished by metabolic processes involving synthesize of macromolecules, such as nu ...
Identification and Characterization of the
... H-Pi cotransporter. Each protein consists of 12 membrane-spanning regions that are separated into two groups of 6 membrane-spanning domains by a larger hydrophilic region, a characteristic topology shared by numerous solute transporters belonging to the major facilitator superfamily (Pao et al., 19 ...
... H-Pi cotransporter. Each protein consists of 12 membrane-spanning regions that are separated into two groups of 6 membrane-spanning domains by a larger hydrophilic region, a characteristic topology shared by numerous solute transporters belonging to the major facilitator superfamily (Pao et al., 19 ...
GCSE Biology Textbook sample
... a mitochondrion indicates how active a cell is. Chloroplast size varies from one species to another. Scientists sometimes investigate the ratio of the area of the cytoplasm to that of the nucleus in micrographs. A high ratio of cytoplasmic:nuclear volume can indicate that the cell is about to di ...
... a mitochondrion indicates how active a cell is. Chloroplast size varies from one species to another. Scientists sometimes investigate the ratio of the area of the cytoplasm to that of the nucleus in micrographs. A high ratio of cytoplasmic:nuclear volume can indicate that the cell is about to di ...
Receptor-Mediated Endocytosis in Plant Cells
... fluorescence image of the same field showing the location of the fluorescent elicitor (b, d, f, h, j, I, n, p, and r). As seen in the micrographs, soon after addition of the elicitor, sufficient amounts of the ligand accumulated at the cell surface to form a fluorescent outline surrounding each cell ...
... fluorescence image of the same field showing the location of the fluorescent elicitor (b, d, f, h, j, I, n, p, and r). As seen in the micrographs, soon after addition of the elicitor, sufficient amounts of the ligand accumulated at the cell surface to form a fluorescent outline surrounding each cell ...
Neurons are highly specialized cells.
... Neurons receive and transmit signals. • Resting potential means no signal is being transmitted. – more Na+ outside of cell – more K+ inside of cell ...
... Neurons receive and transmit signals. • Resting potential means no signal is being transmitted. – more Na+ outside of cell – more K+ inside of cell ...
29.2 Neurons KEY CONCEPT The nervous system is composed of highly specialized cells.
... Neurons receive and transmit signals. • Resting potential means no signal is being transmitted. – more Na+ outside of cell – more K+ inside of cell ...
... Neurons receive and transmit signals. • Resting potential means no signal is being transmitted. – more Na+ outside of cell – more K+ inside of cell ...
hypersensitivity reactions
... T lymphocytes injure tissues either by triggering inflammation or by directly killing target cells ...
... T lymphocytes injure tissues either by triggering inflammation or by directly killing target cells ...
Structure-Function Approach Identifies a COOH
... polypeptide at the COOH terminus that heterodimerize to form the active heparanase enzyme (9–11). Latent heparanase secretion is directed by an NH2-terminal signal peptide (Met1-Ala35). The secreted protein interacts rapidly and efficiently with cell surface HS proteoglycan (HSPG), low-density lipop ...
... polypeptide at the COOH terminus that heterodimerize to form the active heparanase enzyme (9–11). Latent heparanase secretion is directed by an NH2-terminal signal peptide (Met1-Ala35). The secreted protein interacts rapidly and efficiently with cell surface HS proteoglycan (HSPG), low-density lipop ...
Lesson 15d Comparing Mitosis and Meiosis LP
... ________________23. What are the two parts of cell division? ________________ ________________24. What structure forms in prophase along which the chromosomes move? ________________25. Which phase of mitosis is the last phase that chromatids are together? ________________26. Which phase of the cell ...
... ________________23. What are the two parts of cell division? ________________ ________________24. What structure forms in prophase along which the chromosomes move? ________________25. Which phase of mitosis is the last phase that chromatids are together? ________________26. Which phase of the cell ...
Cell Cycle - University of Bath
... Figure 3 Surveillance and editing mechanisms mediating checkpoint control. (a) Surveillance mechanisms monitor multiple biochemical and architectural parameters that control cell cycle progression. These parameters include the intracellular levels of regulatory proteins, structural and informational ...
... Figure 3 Surveillance and editing mechanisms mediating checkpoint control. (a) Surveillance mechanisms monitor multiple biochemical and architectural parameters that control cell cycle progression. These parameters include the intracellular levels of regulatory proteins, structural and informational ...
11-CellCommunication
... • An activated hormone-receptor complex can act as a transcription factor, turning on specific genes © 2011 Pearson Education, Inc. ...
... • An activated hormone-receptor complex can act as a transcription factor, turning on specific genes © 2011 Pearson Education, Inc. ...
Ecto-enzymes ofmammary gland and its tumours
... and Mg2+ are nearly the same. There is a small amount of residual activity (approx. 3%) in the absence of added bivalent cation, which is not removed by the addition of 1 mM-EDTA. The effects of the Ca2+ and Mg2+ are additive when they are added at less than saturating concentrations, suggesting tha ...
... and Mg2+ are nearly the same. There is a small amount of residual activity (approx. 3%) in the absence of added bivalent cation, which is not removed by the addition of 1 mM-EDTA. The effects of the Ca2+ and Mg2+ are additive when they are added at less than saturating concentrations, suggesting tha ...
Plant Cell Culture
... agar. Agar, a seaweed derivative, is a polysaccharide with a high molecular mass. For medium of the optimum solidity, agar is usually added at a concentration between 0.60.8 percent. Growth regulators are added according to what is required from the culture, but also depends on the type of explant a ...
... agar. Agar, a seaweed derivative, is a polysaccharide with a high molecular mass. For medium of the optimum solidity, agar is usually added at a concentration between 0.60.8 percent. Growth regulators are added according to what is required from the culture, but also depends on the type of explant a ...
Review guide – Trimester 1 Finals General Biology – 2012 Chapter
... contributes to surface tension. What role in nature do cohesion and surface tension play? Describe all the ways water can moderate temperature. What is it about water and its hydrogen bonds that allow it to moderate temperature? Why is solid ice less dense than liquid? What does this mean for living ...
... contributes to surface tension. What role in nature do cohesion and surface tension play? Describe all the ways water can moderate temperature. What is it about water and its hydrogen bonds that allow it to moderate temperature? Why is solid ice less dense than liquid? What does this mean for living ...
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.