سبتمبر 21st, 2018

 

actin filament

actin filament : a two-stranded helical polymer of the protein actin. Actin filaments form the thin filaments of muscle and also the microfilaments of the cytoskeleton of eukaryotic cells. Hence they are a major component of the contractile apparatus of skeletal muscle, and one of the three types of protein filament that form the cytoskeleton, the others being microtubules and intermediate filaments. The filaments, comprising polymerized globular actin…

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actin-binding protein

actin-binding protein any of several proteins that associate with either actin monomers or actin filaments in cells and modify their properties. Many of these proteins are found in the cell cortex, an actin-rich layer just below the plasma membrane. Examples include dystropin, profilin, spectrin and ankyrin, fimbrin and a-actinin (see actinin), filamin, gelsolin, and the myosins. The term is sometimes applied specifically to filamin.

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actin

actin a major protein constituent of the thin filaments of muscle and of the microfilaments found in practically all eukaryotic cells – it comprises 5–10% of the protein of such cells (see actin filament). In solutions of low ionic strength, actin is a globular 42 kDa monomer, termed G-actin. At physiological ionic strengths, G-actin polymerizes into a fibrous form, termed F-actin, which resembles two strings of beads wound…

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لوحات (بوسترات) كيميائية (13) – تركيب الذرة

لوحات (بوسترات) كيميائية لوحة (بوستر) تركيب الذرة

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acridinium esters

acridinium esters: esters of acridine-9-carboxylic acid. They have a quaternary nitrogen centre and are derivatized at the 9 position to give a labile phenyl ester moiety. Acridinium esters such as 2′,6′-dimethyl-4′-phenyl-10-methylacridinium- 9-carboxylate can be used as chemiluminescent labels for antibodies. Light emission is activated by adding hydrogen peroxide under alkaline conditions. In hybridization protection assays, single-stranded DNA probes labelled with acridinium esters are protected against…

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Acridine Orange

Acridine Orange 3,6-bis(dimethylamino)acridine; a dye used as a probe of nucleic acids in microscopy and related techniques. When illuminated under UV light it yields a green (DNA) or reddish-orange (RNA) fluorescence.

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acridine

acridine the parent compound of a series of derivatives, e.g. 3,6-diaminoacridine (proflavin), that are potent mutagens. Some acridines are found in coal tar. They induce frameshift mutations during the replication of DNA by binding to DNA and distorting the double helix, causing additional bases to be incorporated or bases to be omitted. They are used as topical antiseptics and antimalarial agents.

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ackee

ackee or akee a tree, Blighia sapida, native to tropical Africa and widely cultivated in the West Indies, especially Jamaica, for its fruit, the fleshy aril of which is edible when cooked and forms an important item of local diet. Unripe fruits contain toxic amounts of hypoglycin and can cause Jamaican vomiting sickness.

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لوحات (بوسترات) كيميائية (12) – النظائر

لوحات (بوسترات) كيميائية لوحة (بوستر) النظائر Isotopes

لتحميل اللوحة بالحجم الكبير يرجى الضغط على الصورة بزر الماوس اليمين و اختار حفظ باسم.

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