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Anti-actin antibodies (AAA) [1] are found at increased frequency in certain autoimmune diseases and may be of some diagnostic value. In coeliac disease , anti- actin antibody levels correlate with the level of intestinal damage.
Derivatives conjugated with fluorophores are sold widely. Because of its ability to selectively bind filamentous actin (F-actin) and not actin monomers (G-actin), fluorescently labeled phalloidin is more effective than antibodies against actin. [4]
These F-actin threads are typically composed of two helical strands of actin wound around each other, forming a 7 to 9 nanometer wide helix that repeats every 72 nanometers (or every 14 G-actin subunits). [92] In F-actin threads, G-actin molecules are all oriented in the same direction. The two ends of the F-actin thread are distinct from one ...
Primary (direct) immunofluorescence (DIF) uses a single antibody, conjugated to a fluorophore. The antibody recognizes the target molecule (antigen) and binds to a specific region, called the epitope. The attached fluorophore can be detected via fluorescent microscopy, which, depending on the type of fluorophore, will emit a specific wavelength ...
A 4Å cryo-EM structure of dynactin [7] revealed that its filament contains eight Arp1 molecules, one β-actin and one Arp11. In the pointed end complex p62/DCTN4 binds to Arp11 and β-actin and p25 and p27 bind both p62 and Arp11. At the barbed end the capping protein (CapZαβ) binds the Arp1 filament in the same way that it binds actin ...
Type 1 autoimmune hepatitis. Positive antibodies include: [19] [20] Antinuclear antibody (ANA) Anti-smooth muscle antibody (ASMA) - 65% of people; Anti-actin antibodies; Anti-mitochondrial antibodies - rare except for overlap syndromes with primary biliary cholangitis; Anti-soluble liver antigen/liver pancreas antibody antigen - 20% of people
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