In vivo interactions of higher plant Golgi matrix proteins by
... the higher plant secretory pathway which is responsible for the synthesis and processing of proteins, lipids and carbohydrates that are either going to be stored in the cell or secreted to the external environment. The Golgi apparatus, the central organelle of this pathway, consists of a series of s ...
... the higher plant secretory pathway which is responsible for the synthesis and processing of proteins, lipids and carbohydrates that are either going to be stored in the cell or secreted to the external environment. The Golgi apparatus, the central organelle of this pathway, consists of a series of s ...
Cell Biology - New Age International
... (b) These have a characteristics trilaminar appearance when viewed with electron microscope. (c) The three layers are a result of the same arrangement of proteins and lipids as proposed by Danielli and Davson. 4. Singer and Nicolson (1972) put forward the “fluid mosaic model” of membrane structure. ...
... (b) These have a characteristics trilaminar appearance when viewed with electron microscope. (c) The three layers are a result of the same arrangement of proteins and lipids as proposed by Danielli and Davson. 4. Singer and Nicolson (1972) put forward the “fluid mosaic model” of membrane structure. ...
Membrane Structure and Function
... ___________________________________ ___________________________________ ___________________________________ 5 Loss of the phosphate restores the protein’s original ...
... ___________________________________ ___________________________________ ___________________________________ 5 Loss of the phosphate restores the protein’s original ...
Actin in plants
... deposition of the cross wall) actually occurs over this period. Perhaps further clues for the basis of these differences between higher plants and animals can be found in organisms, such as the filamentous alga Spirogyra, in which cytokinesis occurs by a mixture of in-furrowing and cell plate deposi ...
... deposition of the cross wall) actually occurs over this period. Perhaps further clues for the basis of these differences between higher plants and animals can be found in organisms, such as the filamentous alga Spirogyra, in which cytokinesis occurs by a mixture of in-furrowing and cell plate deposi ...
Higher-order chromatin structure: looping long molecules
... late 1800s (Flemming, 1882). Almost 100 years later, Paulson and Laemmli (1977) gently removed histone proteins from metaphase chromosomes and saw that after extraction DNA remained attached to an insoluble proteinaceous structure. The micrographs showed the DNA spreading out as large loops attached ...
... late 1800s (Flemming, 1882). Almost 100 years later, Paulson and Laemmli (1977) gently removed histone proteins from metaphase chromosomes and saw that after extraction DNA remained attached to an insoluble proteinaceous structure. The micrographs showed the DNA spreading out as large loops attached ...
Lecture 15 Membrane Proteins I
... Lecture 15 Membrane Proteins I Introduction What are membrane proteins and where do they exist? Proteins consist of three main classes which are classified as globular, fibrous and membrane proteins. A cell is enveloped by a membrane which makes the boundary of a cell and enables it to maintain the ...
... Lecture 15 Membrane Proteins I Introduction What are membrane proteins and where do they exist? Proteins consist of three main classes which are classified as globular, fibrous and membrane proteins. A cell is enveloped by a membrane which makes the boundary of a cell and enables it to maintain the ...
VIOGENE
... method to purify total RNA from various samples such as cultured cells, tissues, and bacteria. A simple silica-membrane spin-column method can isolate total RNA without need of performing time-consuming phenol/ chloroform extraction and ethanol precipitation. Total RNA longer than 200 nucleotides ar ...
... method to purify total RNA from various samples such as cultured cells, tissues, and bacteria. A simple silica-membrane spin-column method can isolate total RNA without need of performing time-consuming phenol/ chloroform extraction and ethanol precipitation. Total RNA longer than 200 nucleotides ar ...
Eukaryotic checkpoints are absent in the cell division cycle of
... One of the most important cell division regulators is p34cdc2, a 34 kDa Ser/Thr kinase, which is the product of the cdc2 gene of Schizosaccharomyces pombe and of the cdc28 gene of S. cerevisiae (Hindley and Phear 1984; Lorincz and Reed 1984). The p34cdc2 is activated at the ‘start’, the beginning of ...
... One of the most important cell division regulators is p34cdc2, a 34 kDa Ser/Thr kinase, which is the product of the cdc2 gene of Schizosaccharomyces pombe and of the cdc28 gene of S. cerevisiae (Hindley and Phear 1984; Lorincz and Reed 1984). The p34cdc2 is activated at the ‘start’, the beginning of ...
ELECTRON-MICROSCOPE ILLUSTRATIONS OF DIVISION IN
... outer layer is electron-transparent and is made visible in the specimens by a tenuous electron-dense layer on its outer side. The zone between the bacterial cell wall and the host cell cytoplasm presents a wide range of appearances. The wall may be in direct contact with the host cytoplasm (figs. l ...
... outer layer is electron-transparent and is made visible in the specimens by a tenuous electron-dense layer on its outer side. The zone between the bacterial cell wall and the host cell cytoplasm presents a wide range of appearances. The wall may be in direct contact with the host cytoplasm (figs. l ...
Programmed cell death in plant development
... (KORSMEYER1995). Over the past five or six years about 30 new molecules have been discovered that initiate or regulate apoptosis. At least 20 other molecules associated with signalling or DNA replication, transcription or repair, have been recognised as affecting the regulation of apoptosis (WILLIE ...
... (KORSMEYER1995). Over the past five or six years about 30 new molecules have been discovered that initiate or regulate apoptosis. At least 20 other molecules associated with signalling or DNA replication, transcription or repair, have been recognised as affecting the regulation of apoptosis (WILLIE ...
Sus1, a Functional Component of the SAGA Pore-Associated mRNA Export Machinery
... Another key player in mRNA export is the conserved nuclear protein Yra1/Aly, which acts upstream of the mRNA-exporter and is thought to couple intranuclear steps in mRNP biogenesis with mRNA export (Reed and Hurt, 2002). In yeast, Yra1 interacts with Mex67 (Sträßer and Hurt, 200; Stutz et al., 2000 ...
... Another key player in mRNA export is the conserved nuclear protein Yra1/Aly, which acts upstream of the mRNA-exporter and is thought to couple intranuclear steps in mRNP biogenesis with mRNA export (Reed and Hurt, 2002). In yeast, Yra1 interacts with Mex67 (Sträßer and Hurt, 200; Stutz et al., 2000 ...
Cytokinesis in Scytosiphon zygotes - Journal of Cell Science
... plants (Samuels et al., 1995; Verma and Gu, 1996), although there is no specialized structure such as the phragmoplast. Brown algal cells have a combination of features similar to centrosomal spindle formation in animal cells and cell plate formation in mitosis and cytokinesis in land plants. In bro ...
... plants (Samuels et al., 1995; Verma and Gu, 1996), although there is no specialized structure such as the phragmoplast. Brown algal cells have a combination of features similar to centrosomal spindle formation in animal cells and cell plate formation in mitosis and cytokinesis in land plants. In bro ...
Minneapolis Community and Technical College (MCTC): Biology
... Osteon Model Osteon (also called: Haversian system) Central canal: contains artery, vein, lymph vessel and nerve Concentric lamella (lamellae = plural) Osteocyte Lacuna (lacunae = plural) Canaliculus (canaliculi = plural) The Axial Skeleton Before you begin your study of the skeletal system, first s ...
... Osteon Model Osteon (also called: Haversian system) Central canal: contains artery, vein, lymph vessel and nerve Concentric lamella (lamellae = plural) Osteocyte Lacuna (lacunae = plural) Canaliculus (canaliculi = plural) The Axial Skeleton Before you begin your study of the skeletal system, first s ...
Life: The Science of Biology, 9e
... • 6.3 What Are the Passive Processes of Membrane Transport? • 6.4 What Are the Active Processes of Membrane Transport? ...
... • 6.3 What Are the Passive Processes of Membrane Transport? • 6.4 What Are the Active Processes of Membrane Transport? ...
H1 and HMG17 extracted from calf thymus nuclei are
... gene transfer studies. It is worth mentioning in this context that core histones were also shown to be transfectionactive but with lower efficiency10 (and our unpublished data). The effect that H1 inhibits or blocks transcription in cell-free systems can obviously be overcome in intact cells.16 This ...
... gene transfer studies. It is worth mentioning in this context that core histones were also shown to be transfectionactive but with lower efficiency10 (and our unpublished data). The effect that H1 inhibits or blocks transcription in cell-free systems can obviously be overcome in intact cells.16 This ...
Nuclear Synthesis of Cytoplasmic Ribonucleic Acid
... considerable variability within their experiment; the activity incorporated by enucleated cells varied from none to a level equivalent to that found in the least active nucleated cells. This variability could conceivably be related to various states of starvation. It should be understood also that f ...
... considerable variability within their experiment; the activity incorporated by enucleated cells varied from none to a level equivalent to that found in the least active nucleated cells. This variability could conceivably be related to various states of starvation. It should be understood also that f ...
changes in the ultrastructure of capsicum annuum l. seedlings roots
... The increased aluminum concentration induced numerous disorders in the cell ultrastructure of roots of red pepper cv. `Trapez`. These changes prove the high sensitivity of the studied cultivar to aluminum toxicity, which is confirmed by earlier results obtained by K o n a r s k a (2004a) relating to ...
... The increased aluminum concentration induced numerous disorders in the cell ultrastructure of roots of red pepper cv. `Trapez`. These changes prove the high sensitivity of the studied cultivar to aluminum toxicity, which is confirmed by earlier results obtained by K o n a r s k a (2004a) relating to ...
Androgen receptor complexes probe DNA for recognition
... membrane proteins, but in recent years, data on the threedimensional (3D) mobility of fluorescently labeled proteins in the nuclei of living cells have been extracted using this approach. The intra-nuclear mobility of fluorescently labeled inert proteins, such as streptavidin (Grünwald et al., 2008 ...
... membrane proteins, but in recent years, data on the threedimensional (3D) mobility of fluorescently labeled proteins in the nuclei of living cells have been extracted using this approach. The intra-nuclear mobility of fluorescently labeled inert proteins, such as streptavidin (Grünwald et al., 2008 ...
Emerging biological roles of Cl− intracellular channel proteins
... proteins in these processes and the lessons learned from genetargeting studies. We also highlight outstanding questions regarding the molecular function(s) of these important but still poorly understood proteins. ...
... proteins in these processes and the lessons learned from genetargeting studies. We also highlight outstanding questions regarding the molecular function(s) of these important but still poorly understood proteins. ...
QUESTION
... a cell. It allows certain substances into the cell, while keeping other substances out. (the boy was able to get in but had a hard time getting out) QUESTION: What is the cell membrane? ...
... a cell. It allows certain substances into the cell, while keeping other substances out. (the boy was able to get in but had a hard time getting out) QUESTION: What is the cell membrane? ...
The molecular basis for selective assembly of the UBAP1
... domain (amino acids 17–63) (Agromayor et al., 2012; de Souza and Aravind, 2010; Stefani et al., 2011). Although we failed to express UBAP1(1-63)–strep (data not shown) a slightly longer Nterminal fragment, UBAP1(1-95)–strep, that incorporates an additional predicted a-helix (Fig. 2B), could be gener ...
... domain (amino acids 17–63) (Agromayor et al., 2012; de Souza and Aravind, 2010; Stefani et al., 2011). Although we failed to express UBAP1(1-63)–strep (data not shown) a slightly longer Nterminal fragment, UBAP1(1-95)–strep, that incorporates an additional predicted a-helix (Fig. 2B), could be gener ...
Cell nucleus
In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.Cell nuclei contain most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are the cell's nuclear genome. The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell. The main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm, and the nucleoskeleton (which includes nuclear lamina), a network within the nucleus that adds mechanical support, much like the cytoskeleton, which supports the cell as a whole.Because the nuclear membrane is impermeable to large molecules, nuclear pores are required that regulate nuclear transport of molecules across the envelope. The pores cross both nuclear membranes, providing a channel through which larger molecules must be actively transported by carrier proteins while allowing free movement of small molecules and ions. Movement of large molecules such as proteins and RNA through the pores is required for both gene expression and the maintenance of chromosomes. The interior of the nucleus does not contain any membrane-bound sub compartments, its contents are not uniform, and a number of sub-nuclear bodies exist, made up of unique proteins, RNA molecules, and particular parts of the chromosomes. The best-known of these is the nucleolus, which is mainly involved in the assembly of ribosomes. After being produced in the nucleolus, ribosomes are exported to the cytoplasm where they translate mRNA.