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myofilament
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∙ 14y ago
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What is actin or myosin-containing structure?
actin and myosin are myofillaments that make up myofibrils (part of a muscle fibre) (so therefore : muscle is an actin or myosin containing structure
What contains actin filaments?
Microfilaments contain actin filaments. They are the thinnest filaments of the cytoskeleton, which is a structure found in the cytoplasm of eukaryotic cells.
What is the structure of the cytoskeloton?
The cytoskeleton is made out of microtubes- specifically intermediate filaments and actin filaments.
What is the function of actin filaments?
providing structure support and involved in movement.
What contains filament?
Microfilaments contain actin filaments. They are the thinnest filaments of the cytoskeleton, which is a structure found in the cytoplasm of eukaryotic cells.
Actin makes up cytoskeleton fibers called?
The actin that makes up cytoskeleton fibers are called microfilaments. They are the thinnest filaments of the cytoskeleton a structure found in the cytoplasm of eukaryotic cells.Ê
What are the proteins are involved in muscle contraction?
Actin and myosin
What is contraction of muscles?
"Muscle contraction begins with an electrical nerve impulse that results in a release of Ca2+ ions into the myosin-actin structure. The calcium ions in turn produce conformational changes that result in the sliding of the threads through each other, shortening the myosin-actin structure. The collective effect of this process is the contraction of the muscle."
What is composed of actin?
Actin is essentially a ball ('globular') with two key features: 1. a particular region binds and hydrolyzes adenosine triphosphate (ATP); 2. Other regions allow actin molecules to bind to one another head-to-tail. I won't discuss the ATP hydrolysis here. When actin molecules bind each other, they form a spiral-staircase-like ('alpha-helical') string called a 'filament.' Multiple actin filaments come together to form bundles or fibers. These higher-order structures are so big and so prevalent that they can be seen in living cells through a microscope. The atomic structure of globular actin is available for free here: http://www.ncbi.nlm.nih.gov/Structure/mmdb/mmdbsrv.cgi?uid=47984
What is the function of actin?
Actin is a globular multi-functional protein that forms microfilaments. Actin takes part in many important cellular processes, including: muscle contraction; cell motility; cell division and cytokinesis; vesicle and organelle movement; cell signaling; and the establishment and maintenance of cell junctions and cell shape.
What are the names of protein filaments in a muscle fiber?
Actin Filaments
What is cytosquelette?
A dynamic structure that stabilizes cells lacking a cell wall (=animal cells). It consists out of microtubules, intermediate filaments and actin filaments.
