1 - Purdue Department of Biological Sciences
... protoxylem undergoes severe stretching and is eventually destroyed. Metaxylem is initiated in the still-growing primary plant body, but matures largely after stem elongation is completed. Metaxylem may have spiral, scalariform, reticulate, or pitted elements. In plants lacking secondary growth, the ...
... protoxylem undergoes severe stretching and is eventually destroyed. Metaxylem is initiated in the still-growing primary plant body, but matures largely after stem elongation is completed. Metaxylem may have spiral, scalariform, reticulate, or pitted elements. In plants lacking secondary growth, the ...
Studies on the Bacterial Component of Soybean Root
... preparations there was a certain amount of shrinkage of the bacteroids resulting in empty spaces between them and their cell walls; it is probable that in life these were closely applied to the surface of the bacteroids. The space between the bacteroid walls and the membrane envelope was occupied by ...
... preparations there was a certain amount of shrinkage of the bacteroids resulting in empty spaces between them and their cell walls; it is probable that in life these were closely applied to the surface of the bacteroids. The space between the bacteroid walls and the membrane envelope was occupied by ...
localization of products of atp hydrolysis in mammalian smooth
... reticulum in skeletal muscle similarly treated, suggesting that the organelle systems in the two types of muscle cells subserve a common function. ...
... reticulum in skeletal muscle similarly treated, suggesting that the organelle systems in the two types of muscle cells subserve a common function. ...
Polysialic acid controls NCAM signals at cell–cell contacts to
... migration (Friedl and Wolf, 2010). However, little is known on mechanisms linking cell–cell and cell–matrix adhesion to adjust cellular motility. The neural cell adhesion molecule NCAM, a recognition molecule of the immunoglobulin superfamily plays a pivotal role in cell–cell interactions, as studie ...
... migration (Friedl and Wolf, 2010). However, little is known on mechanisms linking cell–cell and cell–matrix adhesion to adjust cellular motility. The neural cell adhesion molecule NCAM, a recognition molecule of the immunoglobulin superfamily plays a pivotal role in cell–cell interactions, as studie ...
Gastrulation in the sea anemone Nematostella
... flattened region of embryonic surface, and we can detect its edges only on the basis of the shape of cell apexes (Fig. 3j). However, at the next developmental stage, the whole pre-endodermal plate starts to sink in (Fig. 4a–d). The sinking is a result of the gradual bending of circumferential region ...
... flattened region of embryonic surface, and we can detect its edges only on the basis of the shape of cell apexes (Fig. 3j). However, at the next developmental stage, the whole pre-endodermal plate starts to sink in (Fig. 4a–d). The sinking is a result of the gradual bending of circumferential region ...
Histochemical Polymorphism of Keratin Pearls in Squamous Cell
... It can be assumed that such staining of PAS-positive keratin pearls is due to development of parakeratosis, i.e. the process of keratinization abnormality. In conventional histological hematoxylin and eosin staining the third type of keratin pearls is revealed, which are characterized with weak eosi ...
... It can be assumed that such staining of PAS-positive keratin pearls is due to development of parakeratosis, i.e. the process of keratinization abnormality. In conventional histological hematoxylin and eosin staining the third type of keratin pearls is revealed, which are characterized with weak eosi ...
University of Birmingham Armadillo repeat proteins: beyond the
... The first Arm repeat protein to be implicated in cytoskeletal regulation in multicellular organisms was b-catenin, a component of adherens junctions in animals. Adherens junctions are points of intercellular contact, where cadherin molecules at the plasma membrane are anchored to the actin cytoskele ...
... The first Arm repeat protein to be implicated in cytoskeletal regulation in multicellular organisms was b-catenin, a component of adherens junctions in animals. Adherens junctions are points of intercellular contact, where cadherin molecules at the plasma membrane are anchored to the actin cytoskele ...
Biofilms: a biological antimicrobial resistance system
... but with some peculiarities. Moreover, resistance to disinfection is frequently associated with the presence of biofilms on surfaces. The definition of resistance needs to be clarified as it changes depending on whether planktonic or biofilm cells are considered. In the first case, a bacterial strai ...
... but with some peculiarities. Moreover, resistance to disinfection is frequently associated with the presence of biofilms on surfaces. The definition of resistance needs to be clarified as it changes depending on whether planktonic or biofilm cells are considered. In the first case, a bacterial strai ...
POP-1 and Anterior–Posterior Fate Decisions in
... blastomeres are killed or removed (Sulston et al., 1983; Junkersdorf and Schierenberg, 1992; Mello et al., 1992; Hutter and Schnabel, 1995). For example, the MS descendant born from the division sequence p-a-a-p-p undergoes apoptosis even if every blastomere except for MS is killed (Mello et al., 19 ...
... blastomeres are killed or removed (Sulston et al., 1983; Junkersdorf and Schierenberg, 1992; Mello et al., 1992; Hutter and Schnabel, 1995). For example, the MS descendant born from the division sequence p-a-a-p-p undergoes apoptosis even if every blastomere except for MS is killed (Mello et al., 19 ...
localization of products of atp hydrolysis in
... present experiment was well above that observed to yield this spurious localization, but the degree of enzyme inactivation or of lead-mediated substrate hydrolysis was not ascertained by an independent chemical assay. However, the results of the four control experiments indicate that the lead salt d ...
... present experiment was well above that observed to yield this spurious localization, but the degree of enzyme inactivation or of lead-mediated substrate hydrolysis was not ascertained by an independent chemical assay. However, the results of the four control experiments indicate that the lead salt d ...
Document
... What side is the lesion on? Deficits from lesion (white area)? LATERAL MEDULLARY SYNDROME? ARTERY=PICA? ...
... What side is the lesion on? Deficits from lesion (white area)? LATERAL MEDULLARY SYNDROME? ARTERY=PICA? ...
Stem Cells – general characteristic and sources
... fluid, umbilical cord blood and fetal tissues. MSCs are able to differentiate into adipocytes, osteocytes, chondrocytes, smooth muscle cells and hematopoietic supportive stroma [15]. In a steady state and or in response to injury, turnover of stromal tissue and occurs through the participation of a ...
... fluid, umbilical cord blood and fetal tissues. MSCs are able to differentiate into adipocytes, osteocytes, chondrocytes, smooth muscle cells and hematopoietic supportive stroma [15]. In a steady state and or in response to injury, turnover of stromal tissue and occurs through the participation of a ...
Localization of Human Cytomegalovirus Structural Proteins to the
... of the nucleus was examined initially because it has been defined biochemically and thus represented a nuclear compartment which could be analyzed by both biochemical and imaging techniques. The nuclear matrix is a proteinaceous network which is tightly associated with the inner nuclear membrane. In ...
... of the nucleus was examined initially because it has been defined biochemically and thus represented a nuclear compartment which could be analyzed by both biochemical and imaging techniques. The nuclear matrix is a proteinaceous network which is tightly associated with the inner nuclear membrane. In ...
Auxin Metabolism and Function in the Multicellular Brown Alga
... collected, and the levels of several auxin compounds were measured by both liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry. Table I shows that E. siliculosus contains low but significant amounts of auxin indole-3-acetic acid (IAA), indole-3-carboxylic acid (ICA), and ...
... collected, and the levels of several auxin compounds were measured by both liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry. Table I shows that E. siliculosus contains low but significant amounts of auxin indole-3-acetic acid (IAA), indole-3-carboxylic acid (ICA), and ...
Regulation of the cytoplasmic accumulation of 5
... curve at the initiation of the chase, was 0.9-1.0 pmol/ 106 cells per h. The internalization of receptor-bound 5-methyl[3H]tetrahydrofolic acid in the absence of an exogenous source of the ligand can be divided into two steps: (a) movement of the receptor-ligand complex into an acid-resistant membra ...
... curve at the initiation of the chase, was 0.9-1.0 pmol/ 106 cells per h. The internalization of receptor-bound 5-methyl[3H]tetrahydrofolic acid in the absence of an exogenous source of the ligand can be divided into two steps: (a) movement of the receptor-ligand complex into an acid-resistant membra ...
The Influence of the Host Cell on the Inhibition of Virus Protein
... Plaque assay of viruses. Both VSV and mengovirus were plaqued on L-929 cells. Appropriate Io-fold dilutions of the virus sample were made in PBS and o.2 ml was added per 6o mm plate of confluent cells in duplicate. Virus was adsorbed for 3o min at 36 °C with periodic agitation of the plates to ensur ...
... Plaque assay of viruses. Both VSV and mengovirus were plaqued on L-929 cells. Appropriate Io-fold dilutions of the virus sample were made in PBS and o.2 ml was added per 6o mm plate of confluent cells in duplicate. Virus was adsorbed for 3o min at 36 °C with periodic agitation of the plates to ensur ...
improving methodological strategies for satellite cells counting in
... and plasmalema of adult skeletal muscle fibres. Satellite cells are relatively rare structures, probably evenly distributed along individual muscle fibres, but more concentrated within end plate regions. When activated they enter the mytotic cycle, proliferate and fuse either with each other or with ...
... and plasmalema of adult skeletal muscle fibres. Satellite cells are relatively rare structures, probably evenly distributed along individual muscle fibres, but more concentrated within end plate regions. When activated they enter the mytotic cycle, proliferate and fuse either with each other or with ...
Sorting between the ER and Golgi
... which is not a naturally occurring mammalian protein. When one considers soluble cargo molecules like enzymes or growth factors, it immediately becomes apparent that they cannot directly engage COPII coat complexes on the ER membrane in the same way that transmembrane proteins can, that is by virtue ...
... which is not a naturally occurring mammalian protein. When one considers soluble cargo molecules like enzymes or growth factors, it immediately becomes apparent that they cannot directly engage COPII coat complexes on the ER membrane in the same way that transmembrane proteins can, that is by virtue ...
Extracellular matrix
In biology, the extracellular matrix (ECM) is a collection of extracellular molecules secreted by cells that provides structural and biochemical support to the surrounding cells. Because multicellularity evolved independently in different multicellular lineages, the composition of ECM varies between multicellular structures; however, cell adhesion, cell-to-cell communication and differentiation are common functions of the ECM.The animal extracellular matrix includes the interstitial matrix and the basement membrane. Interstitial matrix is present between various animal cells (i.e., in the intercellular spaces). Gels of polysaccharides and fibrous proteins fill the interstitial space and act as a compression buffer against the stress placed on the ECM. Basement membranes are sheet-like depositions of ECM on which various epithelial cells rest.The plant ECM includes cell wall components, like cellulose, in addition to more complex signaling molecules. Some single-celled organisms adopt multicelluar biofilms in which the cells are embedded in an ECM composed primarily of extracellular polymeric substances (EPS).