Branching Processes
Mostrando 13-24 de 57 artigos, teses e dissertações.
-
13. ATP hydrolysis on actin-related protein 2/3 complex causes debranching of dendritic actin arrays
Extension of lamellipodia, an important dissipative process in cell motility, is driven by the turnover of a polarized dendritic array of actin filaments. Motility is driven by catalytic cycles of filament attachment to Wiskott–Aldrich syndrome protein (WASP)-activated actin-related protein (Arp)2/3 complex at the leading edge, branch formation, and de
National Academy of Sciences.
-
14. Regulation of mammary gland branching morphogenesis by the extracellular matrix and its remodeling enzymes
A considerable body of research indicates that mammary gland branching morphogenesis is dependent, in part, on the extracellular matrix (ECM), ECM-receptors, such as integrins and other ECM receptors, and ECM-degrading enzymes, including matrix metalloproteinases (MMPs) and their inhibitors, tissue inhibitors of metalloproteinases (TIMPs). There is some evid
BioMed Central.
-
15. A simple explanation for taxon abundance patterns
For taxonomic levels higher than species, the abundance distributions of the number of subtaxa per taxon tend to approximate power laws but often show strong deviations from such laws. Previously, these deviations were attributed to finite-time effects in a continuous-time branching process at the generic level. Instead, we describe herein a simple discrete
The National Academy of Sciences.
-
16. Argyrophilic cells in the larynx of the guinea-pig demonstrated by the method of Grimelius.
Argyrophilic cells with branching processes are shown in both the surface epithelium and in the glands in the larynx of adult guinea-pigs using the Grimelius silver technique after GPA fixation. When Bouin's fixative or neutral formalin were used as fixatives argrophilic cells could not be identified.
-
17. Branching Mutant rms-2 in Pisum sativum (Grafting Studies and Endogenous Indole-3-Acetic Acid Levels).
Isogenic lines of pea (Pisum sativum L.) were used to determine the physiological site of action of the Rms-2 gene, which maintains apical dominance, and its effect on endogenous free indole-3-acetic acid (IAA) levels. In mutant rms-2 scions, which normally produce lateral branches below node 3 and above node 7, apical dominance was almost fully restored by
-
18. Regulation of Dendritic Branching and Filopodia Formation in Hippocampal Neurons by Specific Acylated Protein MotifsD⃞V⃞
Although neuronal axons and dendrites with their associated filopodia and spines exhibit a profound cell polarity, the mechanism by which they develop is largely unknown. Here, we demonstrate that specific palmitoylated protein motifs, characterized by two adjacent cysteines and nearby basic residues, are sufficient to induce filopodial extensions in heterol
The American Society for Cell Biology.
-
19. The Stochastic Search Dynamics of Interneuron Migration
Migration is a dynamic process in which a cell searches the environment and translates acquired information into somal advancement. In particular, interneuron migration during development is accomplished by two distinct processes: the extension of neurites tipped with growth cones; and nucleus translocation, termed nucleokinesis. The primary purpose of our s
The Biophysical Society.
-
20. From fruitflies to mammals: mechanisms of signalling via the Sonic hedgehog pathway in lung development
The hedgehog signalling pathway has been implicated in many different processes in fly and vertebrate development. It is now known that the hedgehog cascade is crucial for the patterning of the early respiratory system. Hedgehog signalling in the lung involves Gli transcription proteins, but their potential downstream target genes have yet to be identified.
BioMed Central.
-
21. Socius Is a Novel Rnd GTPase-Interacting Protein Involved in Disassembly of Actin Stress Fibers
Rho family small GTPases are key regulators of the actin cytoskeleton in various cell types. The Rnd proteins, Rnd1, Rnd2, and Rnd3/RhoE, have been recently identified as new members of the Rho family of GTPases, and expression of Rnd1 or Rnd3 in fibroblasts causes the disassembly of actin stress fibers and the retraction of the cell body to produce extensiv
American Society for Microbiology.
-
22. Pontine neurocytoma.
A case of neurocytoma arising in the rostral pontine region of an 18 year old man is reported. The patient developed a right trochlear nerve palsy and was shown to have a well circumscribed, contrast enhancing mass on magnetic resonance imaging. The tumour was characterised histologically by a uniform population of medium sized round nuclei and slightly eosi
-
23. Allelic Analysis of the Maize amylose-extender Locus Suggests That Independent Genes Encode Starch-Branching Enzymes IIa and IIb.
Starch branching enzymes (SBE) catalyze the formation of [alpha]-1,6-glucan linkages in the biosynthesis of starch. Three distinct SBE isoforms have been identified in maize (Zea mays L.) endosperm, SBEI, IIa, and IIb. Independent genes have been identified that encode maize SBEI and IIb; however, it has remained controversial as to whether SBEIIa and IIb re
-
24. An in vitro tubulogenesis system using cell lines derived from the embryonic kidney shows dependence on multiple soluble growth factors
Interactions between the ureteric bud (UB) and metanephric mesenchyme are crucial for tubulogenesis during kidney development. Two immortalized cell lines derived from the day 11.5 embryonic kidney, UB cells, which appear to be epithelial (cytokeratin-positive, E-cadherin-positive, and ZO-1-positive by immunostaining) and BSN cells, which are largely mesench
The National Academy of Sciences of the USA.