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D-dimer (or D dimer) is a dimer that is a fibrin degradation product (FDP), a small protein fragment present in the blood after a blood clot is degraded by fibrinolysis. It is so named because it contains two D fragments of the fibrin protein joined by a cross-link , hence forming a protein dimer .
NICE was established in an attempt to end the so-called postcode lottery of healthcare in England and Wales, where availability of treatments depended on the NHS Health Authority area in which the patient happened to live, but it has since acquired a high reputation internationally as a role model for the development of clinical guidelines.
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In biochemistry, a protein dimer is a macromolecular complex or multimer formed by two protein monomers, or single proteins, which are usually non-covalently bound. Many macromolecules, such as proteins or nucleic acids, form dimers. The word dimer has roots meaning "two parts", di-+ -mer. A protein dimer is a type of protein quaternary structure.
In European Americans, 2% of the variation in D-dimer levels is due to polymorphisms in various fibrinolysis-related genes such as fibrinogen, PAI-1 and plasminogen. In African Americans the sample was too small to establish any linkage. Fibrinogen mutations, in particular, explained D-dimer levels >20% higher than controls.
In this case the four interfaces between the subunits are identical. It may also have point group symmetry 222 or D 2. This tetramer has different interfaces and the tetramer can dissociate into two identical homodimers. Tetramers of 222 symmetry are "dimer of dimers". Hexamers of 32 point group symmetry are "trimer of dimers" or "dimer of ...
Section 5: Other Test Guidelines; Guidelines are numbered with three digit numbers, the section number being the first number. Sometimes guidelines are suffixed with a letter. Guidelines are under constant review, with guidelines being periodically updated, new guidelines being adopted, and guidelines being withdrawn.