| properdin factor b | <enzyme> A glycine-rich, heat-labile beta-glycoprotein found in blood. It is a proactivator of complement 3 in the alternate pathway of complement activation. Factor b is converted by factor d to c3 convertase. Registry number: EC 3.4.21.47 (12 Dec 1998) |
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| properdin factor d | <enzyme> A serum protein which during the alternate pathway of complement activation converts the inactive properdin factor b to c3 convertase. Registry number: EC 3.4.21.46 (12 Dec 1998) |
| properdin factor E | A serum protein (mw 160,000) required for activation of C3 (third component of complement) by cobra venom factor. See: properdin system. (05 Mar 2000) |
| properdin system | An immunological system that is the alternative pathway for complement, composed of several distinct proteins that react in a serial manner and activate C3 (third component of complement), seemingly without utilizing components C1, C4, and C2; in addition to properdin, the system includes properdin factors A (native C3), B (C3 proactivator), D (C3 proactivator convertase), and perhaps at least one other, E; the system can be activated, in the absence of specific antibody, by bacterial endotoxins, by a variety of polysaccharides and lipopolysaccharides, and by a component of cobra venom. (05 Mar 2000) |
| properitoneal | In front of the peritoneum. (05 Mar 2000) |
| properitoneal inguinal hernia | A complicated hernia having a double sac, one part in the inguinal canal, the other projecting from the internal inguinal ring in the subperitoneal tissues. Synonym: hernia en bissac, Kronlein's hernia. (05 Mar 2000) |
| property | <chemistry> Any measurable aspect of the system. (09 Jan 1998) |
| prophage | The genome of a lysogenic bacteriophage when it is integrated into the chromosome of the host bacterium. The prophage is replicated as part of the host chromosome. (18 Nov 1997) |
| prophase | Classical term for the first phase of mitosis or of one of the divisions of meiosis. During this phase the chromosomes condense and become visible. (18 Nov 1997) |
| prophase i | The first stage in the first meiotic division of meiosis. The individual chromosomes of the cell become clearly visible within the nucleus with a light microscope as they condense from long, thin, wispy structures to thick structures, and they appear as a tangled jumble of paired, identical chromatids. Prophase ends with the disappearance of the nuclear membrane. This is identical to the prophase stage of mitosis. (09 Oct 1997) |
| prophase II | The first stage in the second meiotic division of meiosis, following telophase I. In each of the two cells which were produced by the first meiotic division, the chromosomes migrate towards the cells centre. The stage ends when the chromosomes are aligned along a single plane in the centre of each cell. (09 Oct 1997) |
| prophasis | <medicine> Foreknowledge of a disease; prognosis. Origin: NL, fr. Gr. To show beforehand. See Pro-, and Phasis. Source: Websters Dictionary (01 Mar 1998) |
| prophecy | Origin: OE. Prophecie, OF. Profecie, F. Prophetie, L. Prophetia, fr. Gr, fr. To be an interpreter of the gods, to prophesy, fr. Prophet. See Prophet. 1. A declaration of something to come; a foretelling; a prediction; especially, an inspired foretelling. "He hearkens after prophecies and dreams." (Shak) "Prophecy came not in old time by the will of man." (2. Pet. I. 21) 2. A book of prophecies; a history; as, the prophecy of Ahijah. 3. Public interpretation of Scripture; preaching; exhortation or instruction. Source: Websters Dictionary (01 Mar 1998) |
| prophenpyridamine maleate | 1-phenyl-1-(2-pyridyl)-3-dimethylaminopropane maleate;an antihistaminic. Synonym: prophenpyridamine maleate. (05 Mar 2000) |
| prophet | 1. One who prophesies, or foretells events; a predicter; a foreteller. 2. One inspired or instructed by God to speak in his name, or announce future events, as, Moses, Elijah, etc. 3. An interpreter; a spokesman. 4. <zoology> A mantis. School of the prophets, a school or college in which young men were educated and trained for public teachers or members of the prophetic order. These students were called sons of the prophets. Origin: F. Prophete, L. Propheta, fr. Gr, literally, one who speaks for another, especially, one who speaks for a god an interprets his will to man, fr. To say beforehand; for, before + to say or speak. See Fame. Source: Websters Dictionary (01 Mar 1998) |