| collagen | <protein> The protein substance of the white fibres (collagenous fibres) of skin, tendon, bone, cartilage and all other connective tissue, composed of molecules of tropocollagen, it is converted into gelatin by boiling. Collagenous pertaining to collagen, forming or producing collagen. Origin: Gr. Kolla = glue, gennan = to produce (18 Nov 1997) |
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| collagen diseases | Historically, a heterogeneous group of acute and chronic diseases, including rheumatoid arthritis, systemic lupus erythematosus, progressive systemic sclerosis, dermatomyositis, etc. This classification was based on the notion that "collagen" was equivalent to "connective tissue", but with the present recognition of the different types of collagen and the aggregates derived from them as distinct entities, the term "collagen diseases" now pertains exclusively to those inherited conditions in which the primary defect is at the gene level and affects collagen biosynthesis, post-translational modification, or extracellular processing directly. (12 Dec 1998) |
| collagen fibre | An individual fibre that varies in diameter from less than 1 um to about 12 um and is composed of fibrils; the fibre's, which are usually arranged in bundles, undergo some branching and are of indefinite length; chemically the fibre is a glycoprotein, collagen, which yields gelatin upon boiling; they make up the principal element of irregular connective tissue, tendons, aponeuroses, and most ligaments, and occur in the matrix of cartilage and osseous tissue. Synonym: white fibre. (05 Mar 2000) |
| collagen fibrils | The fibril's that comprise a collagen fibre, ranging from 20 to 200 nm and averaging about 100 nm in diameter (substantially larger in tendons), with cross-striations averaging 64 nm. Synonym: collagen fibrils. (05 Mar 2000) |
| collagen injection | Correction of superficial soft tissue deformities, acne scars, or age-related skin changes by injection (implantation) of collagen; bovine collagen preparations are commonly used. Prior intradermal testing is necessary to exclude hypersensitivity. (05 Mar 2000) |
| collagen telopeptidase | <enzyme> Neutral metalloproteinase from porcine gingiva; removes the extra-helical extension peptides proximal to the lysyl residue at position 17 Registry number: EC 3.4.24.- Synonym: collagen depolymerase (26 Jun 1999) |
| collagen-vascular diseases | A group of generalised disease's affecting connective tissue and frequently characterised by fibrinoid necrosis or vasculitis; in some collagen disease's, auto-immunization, particularly antinuclear antibodies, has been shown and circulating immune complexes are found. The term is not entirely acceptable because there is no evidence that collagen is primarily involved; "collagen" was once synonymous with "connective tissue" rather than describing a specific fibrinous protein in that tissue. See: connective-tissue diseases. (05 Mar 2000) |
| SLS collagen | <protein> Abnormal packing pattern of collagen molecules formed if ATP is added to acidic collagen solutions, in which lateral aggregates of molecules are produced. Each aggregate is 300 nm long and the molecules are all in register. If SLS aggregates are overlapped with a quarter stagger, the 67 nm banding pattern of normal fibrils is reconstituted. (19 Jan 1998) |
| angiotensin III | <chemical> A heptapeptide formed by the enzymatic hydrolysis of angiotensin II. It has greater activity than angiotensin II for stimulating aldosterone synthesis and in the release of prostaglandins but only 20% of the pressor activity. Chemical name: Angiotensin II, 1-de-L-aspartic acid- (12 Dec 1998) |
| annexin III | <enzyme> A protein of the annexin family that catalyses the conversion of 1-d-inositol 1,2-cyclic phosphate and water to 1-d-myo-inositol 1-phosphate. Chemical name: 1-D-myo-Inositol-1,2-cyclic-phosphate 2-inositolphosphohydrolase Registry number: EC 3.1.4.36 (12 Dec 1998) |
| antithrombin III | <haematology> Antithrombin III is a protein which stimulates the removal of blood clots in the bloodstream. Small blood clots form normally within the bloodstream, but are normally dissolved via the bodys antithrombin III. Conditions that may have an associated low value of antithrombin III include: liver disease and DIC. Normal values are: 0.20 to 0.45 mg/ml or more than 50% of the laboratory control value. Conditions where there is a deficiency of this important protease inhibitor can result in a condition of hypercoagulation, resulting in an increased risk for blood clot formation. Inheritance: autosomal dominant. (13 Jan 1998) |
| apolipoprotein C-III | <biochemistry> An apolipoprotein found in VLDL, HDL, and chylomicrons. (05 Mar 2000) |
| arsenazo III | <chemical> Metallochrome indicator that changes colour when complexed to the calcium ion under physiological conditions. It is used to measure local calcium ion concentrations in vivo. Pharmacological action: dyes, indicators and reagents. Chemical name: 2,7-Naphthalenedisulfonic acid, 3,6-bis((2-arsonophenyl)azo)-4,5-dihydroxy- (12 Dec 1998) |
| arteriae intercostales posteriores III-XI | posterior intercostal arteries 3-11 |
| band III protein | <protein> A 90 kD protein embedded in the surface of the human erythrocyte membrane, identified as the major anion transport/exchange protein. When the red blood cell is in the lungs, brings chlorine ion into the cell in exchange for bicarbonate. Analogous proteins exist in other erythrocytes. A dimeric transmembrane glycoprotein, with binding sites for many cytolasmic proteins, including ankyrin, on its cytoplasmic domain. (18 Nov 1997) |