pulse repetition frequency
pulse repetition frequency (PRF; pulse repetition rate) of a
pulse train. The average number of pulses that occur per second, expressed in hertz. It is equal to the reciprocal of the
period.
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Actin dynamics and functions in the interphase nucleus: moving toward an understanding of nuclear polymeric actin.(Report)
Magazine article from: Biochemistry and Cell Biology; 2/1/2009; ; 700+ words
; ...surrounding the existence of a functional actin population in the cell nucleus has been...demonstrating the multifunctional role of nuclear actin (Bettinger et al. 2004; Franke 2004...2006; Rando et al. 2000; Visa 2005). Actin and actin-related proteins are members...
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Actin: dissecting the structural basis of its oligomerization, polymerization, and polymorphism. (includes panel discussion)(The Cytoskeleton: Mechanical, Physical, and Biological Interactions)
Magazine article from: The Biological Bulletin; 6/1/1998; ; 700+ words
; At first glance, the "actin polymerization" problem may appear to have been solved: that...one of the first steps in the polymerization reaction of G-actin into F-actin filaments involves dimerization of a significant fraction of...
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Actin-depolymerizing factor mediates Rac/Rop GTPase-regulated pollen tube growth
Magazine article from: Plant Cell; 1/1/2003; ; 700+ words
; Pollen tube elongation is a rapid tip growth process that is driven by a dynamic actin cytoskeleton. A ubiquitous family of actin binding proteins, actin-depolymerizing factors (ADFs)/cofilins, bind to actin filaments, induce severing...
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The actin multigene family of Paramecium tetraurelia.(Research article)
Magazine article from: BMC Genomics; 3/28/2007; ; 700+ words
; ...apparently independent of actin; for example, ARP1...dynactin complex [17]. Actins, ALPs and ARPs define...homologous proteins, the actin superfamily, which share...Molecular characteristics of actins (act), actin-related proteins...
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Actin Filaments Play a Critical Role in Vacuolar Trafficking at the Golgi Complex in Plant Cells
Magazine article from: Plant Cell; 3/1/2005; ; 700+ words
; Actin filaments are thought to play an important...demonstrated. Here, we investigated the roles actin filaments play in intracellular trafficking...latrunculin B (Lat B), an inhibitor of actin filament assembly, or actin mutants that...
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ACTIN BINDING PROTEIN29 from Lilium Pollen Plays an Important Role in Dynamic Actin Remodeling(W)(OA)
Magazine article from: Plant Cell; 6/1/2007; ; 700+ words
; ...acids. The deduced 29-kD protein, Lilium ACTIN BINDING PROTEIN29 (ABP29), contains only...The purified recombinant ABP29 accelerates actin nucleation, blocks barbed ends, and severs actin filaments in a Ca)- and/or phosphatidylinositol...
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Actin binding domains direct actin-binding proteins to different cytoskeletal locations.(Research article)
Magazine article from: BMC Cell Biology; 2/13/2008; ; 700+ words
; ...metastatic disease. The polymerization of new actin filaments provides the mechanical force...type determine the arrangement of the F-actin cytoskeleton needed in different domains of the cell. Actin filaments are organized into at least three...
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Actin Polymerization upon Processive Capping by Formin: A Model for Slowing and Acceleration
Magazine article from: Biophysical Journal; 3/1/2007; ; 700+ words
; ...family proteins act as processive cappers of actin filaments, and determine the dynamics...intracellular processes that are based on actin polymerization. The rate of filament growth...vital for understanding the intracellular actin dynamics. We propose a model predicting...
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Actin bundles in neuronal growth cone observed with the Pol-Scope.
Magazine article from: The Biological Bulletin; 10/1/1997; ; 700+ words
; ...axonal growth. Growth cones are rich in actin fibers, which are presumably involved in...movement. Careful observations of labeled actin filaments with a fluorescent microscope or of native actin bundles with a video-enhanced differential...
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Actin-Related Protein2/3 Complex Component ARPC1 Is Required for Proper Cell Morphogenesis and Polarized Cell Growth in Physcomitrella patens(W)
Magazine article from: Plant Cell; 8/1/2005; ; 700+ words
; The actin-related protein2/3 (Arp2/3) complex functions as a regulator of actin filament dynamics in a wide array of eukaryotic...treated with Latrunculin B, a potent inhibitor of actin polymerization. We show in moss that ARPC1, and...
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actin
Book article from: A Dictionary of Biology
actin A contractile protein found in muscle tissue...filament consists of two chains of globular actin molecules, around which is twisted a strand...muscle fibre (see sarcomere ) consist of actin and myosin filaments, which interact to...
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Cytoskeleton
Book article from: Biology
...base filament is composed of a protein called actin that is 42 kilodaltons (kd) in weight. Actin is also the protein that forms the thin filaments found in muscle. When purified actin is incubated in a test tube, 6 nm filamentous...
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Muscle
Book article from: Biology
...necklace to form a strand called fibrous actin (F actin). Two such "necklaces" are then...In the groove between the two F actins, much like a string, is the protein tropomysin. Each G actin contains an active site to bind the...
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Antibodies in Research
Book article from: Biology
...used, consider the challenge of determining where actin is located in a nerve cell. Actin is a protein that forms part of the cytoskeleton...like the human skeleton does. First, purified actin is used to trigger an immune reaction in a rabbit...
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Cytokinesis
Book article from: Biology
...molecular motor, myosin, contracts the actin filaments that form the contractile...signal to the cell periphery that tells actin and other components of the contractile ring to assemble at that location. Actin and microtubules are both part of the...
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