Actin is a globular, roughly 42 kDa protein found in literally all eukaryotic cells, where it may be present at concentrations of over 100 μM.
Actin Robotics Software improves efficiency by specifying ... Actin works with almost any joint type or hand type and with an ... Actin also provides ...
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Actinic granuloma
An annular eruption on sun-exposed skin which microscopically shows phagocytosis of dermal elastic fibres by giant cells and histiocytes.
Synonym: mieschers granuloma.
Actin Filaments
Monomers of the protein actin polymerize to form long, thin fibers. These are about 8 nm in diameter and, being the thinnest of the cytoskeletal filaments, are also called microfilaments.
Actin filament (AK-tin) Part of the cytoskeleton. Actin filaments contract or lengthen to give cells the flexibility to move and change shape. Together with myosin, actin filaments are responsible for muscle contraction.
Acting Director, Data Acquisition and Curation
GDB also appointed Michael A. Chipperfield as Acting Director of Data Acquisition and Curation, effective October 1. Chipperfield assumed the position held for the past 4 years by A.
actin - protein which when polymerized forms microfilaments, part of the cytoskeleton and necessary for cytokinesis and other cellular functions. Also well known as a major component of the contractile apparatus of muscle cells.
actin
[Gk. aktis, a ray]
A globular protein that links into chains, two of which twist helically about each other, forming microfilaments in muscle and other contractile elements in cells.
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actin The protein from which microfilaments are composed; forms the contractile filaments of sarcomeres in muscle cells.
Actinomycin A polypeptide antibiotic from Streptomyces that inhibits the elongation phase of RNA synthesis by binding to double-helical DNA by intercalating with it, thereby preventing the DNA from serving as a template.
Actin Filaments (Microfilaments)
Actin filaments are long, thin fibers composed of 2 chains of protein wrapped around each other.
They occur in bundles or meshlike networks which provide mechanical support and determine the shape of the cell.
prolactin A hormone produced by the anterior pituitary; secreted at the end of pregnancy when it activates milk production by the mammary glands.
promoter The speci?c nucleotide sequence in DNA that marks the beginning of a gene. PICTURE ...
Cis-acting gene: A gene acting on or co-operating with another gene on the same chromosome (see trans-acting gene).
Trans acting factor
A molecule that can diffuse through the cell to act at a distance from where it is made.
Muscles Acting on the Joints of the Digits."Flexion of the metacarpophalangeal joints of the fingers is effected by the Flexores digitorum sublimis and profundus, Lumbricales, and Interossei, ...
Actin filament / thinner than myosin → lighter striations
Myosin filament / thicker than actin filament → darker striation ...
actin A protein in a muscle fiber that, together with myosin, is responsible for contraction and relaxation.
actinomorphic Regular or radially symmetric flowers.
actinotroch Larval form found in Phoronida.
Actin fibers in a cell stained with a fluorescent strain specific for actin ...
When the actin and myosin contract in the muscles, the muscle shortens and the bones are pulled closer together. Muscles called flexors force your joints to bend. Muscles called extensors cause your limbs to straighten.
Occupation: Acting Director, National Human Genome Research Institute
Biography: Dr.
Dominant(-acting) oncogene. A gene that stimulates cell proliferation and contributes to oncogenesis when present in a single copy. (See Oncogene.) ...
- microtubules
- actin filaments (microfilaments)
- intermediate fibers
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Contiguous genes -- genes physically close on a chromosome that when acting together express a phenotype.
Although all eukaryotes contain the common cytoskeletal elements actin and tubulin (both free in the cytoplasm and polymerized in the form of microfilaments and microtubules), intermediate filaments are found only in some metazoan species, ...
Its product binds to DNA, acting as a transcription factor that is critical for testis production. Scientists studying sex reversal, a difference between the chromosomal sex and the phenotypic sex, confirmed the importance of SRY.
The forces acting to cause differential reproductive success of one allele over another in a heterozygote.
Related Terms:
Allele ...
They are composed predominantly of a contractile protein called actin, which is the most abundant cellular protein. Microfilaments' association with the protein myosin is responsible for muscle contraction.
The forces acting to cause one genotype to be more fertile than another genotype.
Related Terms:
Genotype
The term proposed by Johannsen (1909) for the hereditary constitution of an individual, or of particular nuclei within its cells.
the mechanical agent of cytokinesis, made of actin microfilaments. It is located in the cortical cytoplasm and provides the necessary force to split a single cell into two cells.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Proteins have many different functions: structure(collagen); movement (actin and myosin); catalysis (enzymes); transport (hemoglobin); regulation of cellular processes (insulin); ...
Vitamin. Chemical substances required in trace concentrations acting as a cofactor with enzymes in catalyzing biochemical reactions
Viviparous (development). Refers to development of an organism through the juvenile stage within a parent ...
RNA primers - primers used to synthesize DNA strands by acting as a template
RNA splicing - process in which intron sequences are excised from RNA molecules in the nucleus during formation of messenger RNA ...
Relating to, situated near, or acting on the heart.
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acting on many or all genes in all tissues), or tissue-specific (i.e. present only in a particular cell type, and activating the genes restricted to that cell type).
CIS - As used in molecular biology, an interaction between two sites which are located within the same molecule. However, a cis-acting protein can either be one which acts only on the molecule of DNA from which it was expressed, ...
Acontium: Thread-like nematocyst bearing organ attached to lower end of a mesentery or septal filament in the gastrovascular cavity in some Actinaria (Anemones).
Creatures began to arise that were made up of two cells, ten cells, or even thousands, or billions of cells. These cells began to specialize in different jobs. Some acting as hearts, others as eyes, others as brains, ...
He showed that, under stress, some bacteria can induce a mutation to fix a "broken" gene -- and not produce (many) other mutations. In other words, the stress was not acting as generalized mutagen.
 See also: Trans, Cells, Organ, Human, Protein
  
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