| p-lysinase | <enzyme> From chlamydomonas; found in the gametes; converts inactive prolysin to active lysin during the mating reaction; mw 300 kD Registry number: EC 3.4.21.- (26 Jun 1999) |
|---|---|
| p-mercuribenzoate | A commonly used enzyme inhibitor because of its reaction with sulfhydryl groups; usually p-chloromercuribenzoate or p-hydroxymercuribenzoate is used. (05 Mar 2000) |
| P-methyltransferase | <enzyme> Catalyses the formation of a carbon-phosphorus bond; involved in bialaphos biosynthesis; genbank d37877 Registry number: EC 2.1.1.- (26 Jun 1999) |
| P-mitrale | Broad, notched P waves in several or many leads of the electrocardiogram with a prominent late negative component to the P wave in lead V1, presumed to be characteristic of mitral valvular disease. (Although this term is extensively used in electrocardiographic literature, it is actually a misnomer and would be more appropriately called P-sinistrocardiale, as it results from overload of the left atrium regardless of the cause and may occur independently of disease of the mitral valve.) (05 Mar 2000) |
| p-nitrophenyl-alpha-L-rhamnopyranohydrolase | <enzyme> Active toward naringin, hesperidin and p-nitrophenylrhamnosides; specific for alpha-1,2- or alpha-1,6- linkages to beta-d-glucose Registry number: EC 3.2.1.- Synonym: pnp-rhamnohydrolase (26 Jun 1999) |
| P-P interval | The distance between consecutive P waves in the electrocardiogram. (05 Mar 2000) |
| P-pulmonale | Tall, narrow, peaked P waves in electrocardiographic leads II, III, and aVF, and often a prominent initial positive P wave component in V1, presumed to be characteristic of cor pulmonale. (Although this term is extensively used in the electrocardiographic literature, it is actually a misnomer and would be more appropriately called P-dextrocardiale, since it results from overload of the right atrium regardless of the cause, as in tricuspid stenosis, and may occur independently of cor pulmonale.) In lung disease, P-pulmonale is usually transient, occurring during exacerbations. (05 Mar 2000) |
| P-Q interval | In the electrocardiogram, the time elapsing between the beginning of the P wave and the beginning of the next QRS complex; it corresponds to the a-c interval of the venous pulse and is normally 0.12-0.20 sec. Synonym: P-Q interval. (05 Mar 2000) |
| P-R interval | In the electrocardiogram, the time elapsing between the beginning of the P wave and the beginning of the next QRS complex; it corresponds to the a-c interval of the venous pulse and is normally 0.12-0.20 sec. Synonym: P-Q interval. (05 Mar 2000) |
| P-R segment | That part of the electrocardiographic curve between the end of the P wave and the beginning of the QRS complex. (05 Mar 2000) |
| p-rosolic acid | <chemistry> A red colouring matter derived from phenol; called also, in commerce, yellow coralin. Origin: L. Aurum gold. Source: Websters Dictionary (01 Mar 1998) |
| p-selectin | <cell biology> Cell adhesion molecule and CD antigen that mediates the adhesion of neutrophils and monocytes to activated platelets and endothelial cells. (12 Dec 1998) |
| P-sinistrocardiale | An electrocardiographic P-wave characteristic of overloading of the left atrium; often erroneously called P-mitrale, as the syndrome can result from any overloading of the left atrium from any cause. (05 Mar 2000) |
| p-sulfamylacetanilide | An intermediate in the synthesis of sulfanilamide; formed in animal bodies by acetylation of sulfanilamide. Synonym: p-sulfamylacetanilide. (05 Mar 2000) |
| P-TEN phosphatase | <enzyme> A dual-specificity phosphatase that dephosphorylates ser, thr and tyr residues; gene is located on human chromosome 10q23; has been sequenced Registry number: EC 3.1.3.- (26 Jun 1999) |