| prepotency | 1. The quality or condition of being prepotent; predominance. 2. <biology> The capacity, on the part of one of the parents, as compared with the other, to transmit more than his or her own share of characteristics to their offspring. Origin: L. Praepotentia: cf. F. Prepotence. Source: Websters Dictionary (01 Mar 1998) |
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| prepotent | 1. Very powerful; superior in force, influence, or authority; predominant. 2. <biology> Characterised by prepotency. Origin: L. Praepotens. (05 Mar 1998) |
| prepotential | A gradual rise in potential between action potentials as a phasic swing in electric activity of the cell membrane, which establishes its rate of automatic activity, as in the ureter or cardiac pacemaker. (05 Mar 2000) |
| preprocolipase | <chemical> Amino acid sequence given in first source (26 Jun 1999) |
| preprocollagen | The precursor of collagen that is synthesised on ribosomes; procollagen with a leader or signal sequence that directs the polypeptide chain into the vesicular space of the endoplasmic reticulum. (05 Mar 2000) |
| preprocollagenase | <enzyme> Precursor of EC 3.4.24.3 Registry number: EC 3.4.24.- Synonym: type IV preprocollagenase (26 Jun 1999) |
| preproinsulin | The precursor protein to proinsulin. See: preprotein. (05 Mar 2000) |
| preprophase | <cell biology> Rarely used term to designate an extra stage of mitosis, normally included as part of prophase. (18 Nov 1997) |
| preproprotein | <biochemistry> A precursor to an inactive secretory proprotein. A preprotein is a form that contains a signal sequence that specifies its insertion into or through membranes. A proprotein is one that is inactive, the full function is only present when an inhibitory sequence has been removed by proteolysis. A preproprotein has both sequences still present and usually only accumulate as products of in vitro protein synthesis. (22 Sep 2002) |
| preprostate urethral sphincter | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
| preprotein | <biochemistry> A secretory protein with a signal peptide region attached. (05 Mar 2000) |
| preprothrombin carboxylase | <enzyme> Vitamin k-dependent, membrane-bound Registry number: EC 4.1.1.- (26 Jun 1999) |
| preprourokinase | <enzyme> Consists of 431 amino acids, with the first 20 residues being a signal peptide Registry number: EC 3.4.21.- (26 Jun 1999) |
| prepsychotic | 1. <psychology> Relating to the period antedating the onset of psychosis. 2. Denoting a potential for a psychotic episode, one that appears imminent under continued stress. (05 Mar 2000) |
| prepubertal | Before puberty. (05 Mar 2000) |