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 mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197


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-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
Synonym for N4-acetylsulfanilamide ... 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) ...

p-terphenyl
C6H5-C6H4-C6H5;useful as a scintillator in scintillation. ... (05 Mar 2000) ...

P-type ATPase
<enzyme> One of three major classes of ion transport ATPases, characterised by vanadate sensitivity and a phosphorylated intermediate. The archetype is the sodium pump. ... See: F-type ATPase, V-type ATPase. ... (18 Nov 1997) ...

P1
<abbreviation> Parental generation; symbol for inorganic orthophosphate (should not be used when covalently linked to another moiety). ... (05 Mar 2000) ...

p107
<protein> Protein (107 kD) with many similarities to retinoblastoma gene product. Binds to E2F and is found in the cyclin/E2F complex together with p33cdk2. ... (18 Nov 1997) ...

p150 protein kinase
<enzyme> Mw 150 kD; forms a cellular complex with phosphatidylinositol 3-kinase; a homolog of vps15 protein kinase; amino acid sequence given in first source ... Registry number: EC 2.7.1.- ... (26 Jun 1999) ...

p24
<protein> Protein antigen from HIV's core that can be measured in blood and other body fluids. Measurement of p24 levels in the blood have been used to monitor viral activity, although this is not considered a very accurate method due to the existence of p24 antibody that binds with the antigen and makes it undetectable. ... (09 Oct 1997) ...

p260 palmitoyltransferase
<enzyme> Palmitoylates proteins; may be involved in leg development; isolated from bobmyx mori; genbank u67866 ... Registry number: EC 2.3.1.- ... (26 Jun 1999) ...

p270 palmitoyltransferase
<enzyme> Palmitoylates proteins; may be involved in leg development; isolated from bombyx mori; genbank u87867 ... Registry number: EC 2.3.1.- ... (26 Jun 1999) ...

P2Gri
Symbol for diphosphoglycerate. ... (05 Mar 2000) ...

p34 kinase
<protein> See cyclin. ... (18 Nov 1997) ...

p34cdc28 kinase
<enzyme> Phosphorylates peptides ... Registry number: EC 2.7.1.- ... Synonym: p34(cdc28) kinase, cyclin b kinase ... (26 Jun 1999) ...

p34PSK-J3 kinase
<enzyme> A 33.7 kD cyclin d-regulated catalytic subunit that acts as an rb (but not h1) kinase; mouse and human psk-j3 are homologous ... Registry number: EC 2.7.1.- ... Synonym: psk-j3 kinase, psk-j3 gene product, p34psk-j3-cdk4 kinase, cyclin d-dependent kinase cdk4, p34(cdk4), cyclin-dependent kinase 4, cdk4 cyclin-dependent kinase, cdk4 pro …

p35
Synonym for annexin ... <protein> Group of calcium-binding proteins that interact with acidic membrane phospholipids in membranes. They contain 4 or 8 repeats of a 61 amino acid domain that folds into 5 a helices. ... Also known by several other names (e.g. Lipocortins, endonexins), reflecting the history of their discovery in different context …

p36
Synonym for annexin ... <protein> Group of calcium-binding proteins that interact with acidic membrane phospholipids in membranes. They contain 4 or 8 repeats of a 61 amino acid domain that folds into 5 a helices. ... Also known by several other names (e.g. Lipocortins, endonexins), reflecting the history of their discovery in different context …

P400 protein
<protein> Inositol 1,4, 5 triphosphate receptor (InsP3 R). Key protein to understanding mechanisms of InsP3 mediated Ca mobilisation. Originally found as a cerebellar glycoprotein of 250 kD and subsequently shown to be identical to the InsP3 receptor protein. ... (18 Nov 1997) ...

p42(mapk) kinase
<enzyme> A proline-directed serine/threonine kinase which mediates signal transduction from the cell surface to the nucleus. Activation of the enzyme by phosphorylation leads to translocation into the nucleus and phosphorylation of certain transcription factors. ... Registry number: EC 2.7.10.- ... (12 Dec 1998) ...

p49 3F12 kinase
<enzyme> Expressed in the nervous system; autophosphorylates both threonine and tyrosine residues; shows 43% amino acid sequence identity to p42(mapk); amino acid sequence given in first source ... Registry number: EC 2.7.1.- ... Synonym: p49(3f12) kinase, mitogen activated protein kinase p49(3f12), map kinase p49(3f12), p49(3f12) sap kinase …

p53
<molecular biology, oncogene> A gene which encodes a protein that regulates cell growth and is able to cause potentially cancerous cells to destroy themselves. ... In humans it is a 393 residue phosphoprotein that is a tumour suppressor gene rather than an oncogene, as it is frequently inactivated or mutated in tumours and transformed cells.
p53-activating kinase
<enzyme> Regulates p53 activity in saccharomyces cerevisiae; 810 amino acid residues; genbank u24167; do not confuse with pak I, protease-activated kinase ... Registry number: EC 2.7.10.- ... Synonym: pak1 gene product, yeast pak1 ... (26 Jun 1999) ...

p54 protein kinase
<enzyme> A stress-activated kinase related to erk-1 and erk-2 but activated preferentially by heat shock, protein-synthesis inhibitors and thf-alpha; phosphorylates c-jun proteins; genbank l27111 ... Registry number: EC 2.7.10.- ... Synonym: p54 map kinase ... (26 Jun 1999) ...

p57 serine proteinase
<enzyme> From membranes of human erythrocytes; cleaves c3, the third component of complement; mw 57 kD; 20 first n-terminal residues 100% homologous to residues 910-929 of human erythrocyte ankyrin; n-terminal sequence given in first source ... Registry number: EC 3.4.21.- ... Synonym: p57 membrane serine proteinase, erythrocyte p57 proteinase< …

p57lck
<protein> Lymphoid isoform of src family tyrosine kinase. Expressed predominantly in thymocytes and peripheral T-cells. Associates with cytoplasmic domains of CD4 and CD8 and with the _ chain of the interleukin-2 receptor. ... (18 Nov 1997) ...

p65
<protein> Protein from human T-cells that has sequences in common with plastin. Major target for interleukin-2 stimulated phosphorylation. On basis of sequence has two calcium binding sites, a calmodulin binding site and two actin binding sites. ... (18 Nov 1997) ...

p67 deglycosylase
<enzyme> Inactivates eif-2 associated 67 kD protein by removal of n-acetylglucosamine residues ... Registry number: EC 3.2.1.- ... (26 Jun 1999) ...

p68
<protein> See annexin, DEAD box helicases. ... (18 Nov 1997) ...

p68 RNA helicase
<enzyme> An RNA helicase isolated from uv-induced tumours in mice; amino acid sequence has been determined ... Registry number: EC 2.7.7.- ... Synonym: dead box helicase p68 ... (26 Jun 1999) ...

p70
Synonym for annexin ... <protein> Group of calcium-binding proteins that interact with acidic membrane phospholipids in membranes. They contain 4 or 8 repeats of a 61 amino acid domain that folds into 5 a helices. ... Also known by several other names (e.g. Lipocortins, endonexins), reflecting the history of their discovery in different context …

P700
The pigment in chloroplasts bleached by light of wavelengths about 700 nm. ... (05 Mar 2000) ...

p870
The pigment in bacterial chromatophores bleached by light of wavelengths about 870 nm. ... (05 Mar 2000) ...

PA
A physician's assistant or, in anatomy, pa stands for posteroanterior: from back-to-front. See: pa X-ray. ... (12 Dec 1998) ...

PA projection
The standard frontal chest film projection; radiographic skull projection with the petrous ridge superimposed on the orbits. ... Synonym: posteroanterior projection. ... (05 Mar 2000) ...

pa X-ray
An X-ray picture in which the beams pass from back-to-front (posteroanterior). As opposed to an ap (anteroposterior) film in which the rays pass through the body from front-to-back. ... (12 Dec 1998) ...

Paas, H
<person> German physician, *1900. ... See: Paas' disease. ... (05 Mar 2000) ...

Paas' disease
A familial skeletal deformation marked by coxa valga, double patella, shortening of the middle and terminal phalanges of fingers and toes, deformities of the elbows, scoliosis, and spondylitis deformans of the lumbar vertebrae; all of these manifestations may be unilateral or bilateral. ... (05 Mar 2000) ...

PABA
<abbreviation> P-aminobenzoic acid. ... (05 Mar 2000) ...

pablum
A precooked infant food, a mixture of wheat, oat, and corn meals, wheat embryo, alfalfa leaves, brewers' yeast, iron, and sodium chloride. ... Origin: L. Pabulum, nourishment, fr. Pasco, to nourish ... (05 Mar 2000) ...

pabular
Relating to, or of the nature of, pabulum. ... (05 Mar 2000) ...

PAC1 phosphatase
<enzyme> An immediate-early mitogen-inducible tyrosine phosphatase; a map kinase phosphatase; amino acid sequence has been determined ... Registry number: EC 3.1.3.- ... Synonym: pac-1 ... (26 Jun 1999) ...

Pac1 ribonuclease
<enzyme> A homolog of e. Coli rnase III from schizosaccharomyces pombe; amino acid sequence given in first source ... Registry number: EC 3.1.26.- ... Synonym: rnase pac1, pac1 gene product ... (26 Jun 1999) ...

Pacchioni, Antonio
<person> Italian anatomist, 1665-1726. ... See: pacchionian bodies, pacchionian corpuscles, pacchionian depressions, pacchionian glands, pacchionian granulations. ... (05 Mar 2000) ...

pacchionian
Attributed to or described by Pacchioni. ... (05 Mar 2000) ...

pacchionian bodies
Synonym for arachnoid granulations ... Tufted prolongations of pia-arachnoid, composed of numerous arachnoid villi that penetrate dural venous sinuses and effect transfer of cerebrospinal fluid to the venous system. at advanced age these are more numerous and tend to calcify. ... Synonym: granulationes arachnoideales, arachnoidal granulations, pacchi …

pacchionian corpuscles
Synonym for arachnoid granulations ... Tufted prolongations of pia-arachnoid, composed of numerous arachnoid villi that penetrate dural venous sinuses and effect transfer of cerebrospinal fluid to the venous system. at advanced age these are more numerous and tend to calcify. ... Synonym: granulationes arachnoideales, arachnoidal granulations, pacchi …

pacchionian depressions
Synonym for granular pits ... Pits on the inner surface of the skull, along the course of the superior sagittal sinus, in which are lodged the arachnoidal granulations. ... Synonym: foveolae granulares, pacchionian depressions. ... (05 Mar 2000) ...

pacchionian glands
Synonym: arachnoid granulations. ... (05 Mar 2000) ...

pacchionian granulations
Synonym for arachnoid granulations ... Tufted prolongations of pia-arachnoid, composed of numerous arachnoid villi that penetrate dural venous sinuses and effect transfer of cerebrospinal fluid to the venous system. at advanced age these are more numerous and tend to calcify. ... Synonym: granulationes arachnoideales, arachnoidal granulations, pacchi …

pace
1. A single movement from one foot to the other in walking; a step. ... 2. The length of a step in walking or marching, reckoned from the heel of one foot to the heel of the other; used as a unit in measuring distances; as, he advanced fifty paces. ... Ordinarily the pace is estimated at two and one half linear feet; but in measuring distances be ste …

pacefollower
Any cell in excitable tissue that responds to stimuli from a pacemaker. ... (05 Mar 2000) ...

pacemaker
1. <apparatus, physiology> An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker. ... 2. <biochemistry> A substance whose rate of reaction sets the pace for a series of interrelated reactions. ... (24 Mar 1998) ...

pacemaker failure
Failure of an artificial pacemaker to generate or deliver effective stimuli to the myocardium. ... (05 Mar 2000) ...

pacemaker output
Electrical energy delivered into a standard load (500 ohms resistance). ... (05 Mar 2000) ...

pacemaker potential
The voltage inscribed by impulses from an artificial electronic pacemaker. ... (05 Mar 2000) ...

pacemaker sensitivity
The minimum cardiac activity required to consistently trigger a pulse generator. ... (05 Mar 2000) ...

pacemaker syndrome
<syndrome> The occurrence of symptoms relating to the loss of atrial-ventricular synchrony in ventricularly paced patients, or symptoms caused by inadequate timing of atrial and ventricular contractions in paced patients. ... (05 Mar 2000) ...

pacemaker, artificial
A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external). ... (12 Dec 1998) ...

Pacheco's disease
A highly contagious, acute disease of psittacine birds caused by a herpesvirus and characterised by bright yellow urates with scant faeces, icterus, and terminal anorexia. ... (05 Mar 2000) ...

Pacheco's parrot disease virus
Probably a virus of the family Herpesviridae, possibly related to the virus of infectious laryngotracheitis. ... Synonym: parrot virus. ... (05 Mar 2000) ...

pachometer
<apparatus> An instrument for measuring thickness, as of the glass of a mirror, or of paper; a pachymeter. ... Origin: Gr. Thickness. ... (24 Mar 1998) ...

Pachon, Michel
<person> French physiologist, 1867-1938. ... See: Pachon's method, Pachon's test. ... (05 Mar 2000) ...

Pachon's method
Cardiography, carried out with the patient lying on the left side. ... (05 Mar 2000) ...

Pachon's test
In a case of aneurysm, determination of the collateral circulation by estimation of the blood pressure. ... (05 Mar 2000) ...

pachy-
Thick. ... Origin: G. Pachys, thick ... (05 Mar 2000) ...

pachyblepharon
Thickening of the tarsal border of the eyelid. ... Synonym: tylosis ciliaris. ... Origin: pachy-+ G. Blepharon, eyelid ... (05 Mar 2000) ...

pachycephalia
Synonym for pachycephaly ... Abnormal thickness of the skull. ... Synonym: pachycephalia. ... Origin: pachy-+ G. Kephale, head ... (05 Mar 2000) ...

pachycephalic
Pachycephalous ... Relating to or marked by pachycephaly. ... (05 Mar 2000) ...

pachycephaly
Abnormal thickness of the skull. ... Synonym: pachycephalia. ... Origin: pachy-+ G. Kephale, head ... (05 Mar 2000) ...

pachycheilia
Pachychilia ... Swelling or abnormal thickness of the lips. ... Origin: pachy-+ G. Cheilos, lip ... (05 Mar 2000) ...

pachycholia
Inspissation of the bile. ... Origin: pachy-+ G. Chole, bile ... (05 Mar 2000) ...

pachychromatic
Having a coarse chromatin reticulum. ... (05 Mar 2000) ...

pachychymia
Inspissation of the chyme. ... Origin: pachy-+ G. Chymos, juice ... (05 Mar 2000) ...

pachydactylia
Synonym for pachydactyly ... Enlargement of the fingers or toes, especially extremities; often seen in neurofibromatosis. ... Synonym: pachydactylia. ... Origin: pachy-+ G. Daktylos, finger or toe ... (05 Mar 2000) ...

pachydactyly
Enlargement of the fingers or toes, especially extremities; often seen in neurofibromatosis. ... Synonym: pachydactylia. ... Origin: pachy-+ G. Daktylos, finger or toe ... (05 Mar 2000) ...

pachyderma
Abnormally thick skin. ... See: elephantiasis. ... Synonym: pachydermatosis, pachydermia. ... Origin: pachy-+ G. Derma, skin ... (05 Mar 2000) ...

pachyderma laryngis
A circumscribed connective tissue hyperplasia at the posterior commissure of the larynx. ... (05 Mar 2000) ...

pachyderma lymphangiectatica
Elephantiasis due to lymph stasis. ... (05 Mar 2000) ...

pachyderma verrucosa
Chronic wart-like elephantiasis due to lymph stasis. ... (05 Mar 2000) ...

pachyderma vesicae
Elephantiasis with nodules comprised of lymph vesicles on the skin surface. ... (05 Mar 2000) ...

pachydermatocele
Synonym: cutis laxa. ... 2. Obsolete term for a huge neurofibroma. ... Origin: pachy-+ G. Derma, skin, + kele, tumour ... (05 Mar 2000) ...

pachydermatosis
Synonym for pachyderma ... Abnormally thick skin. ... See: elephantiasis. ... Synonym: pachydermatosis, pachydermia. ... Origin: pachy-+ G. Derma, skin ... (05 Mar 2000) ...

pachydermia
Synonym for pachyderma ... Abnormally thick skin. ... See: elephantiasis. ... Synonym: pachydermatosis, pachydermia. ... Origin: pachy-+ G. Derma, skin ... (05 Mar 2000) ...

pachydermoperiostosis
<radiology> Idiopathic, familial hypertrophic osteoarthropathy, boys at puberty, blacks more than whites, familial, periosteal reaction, thick skin: extremities and forehead, hyperhidrosis, relatively pain free ... (12 Dec 1998) ...

pachydermoperiostosis syndrome
Synonym for pachydermoperiostosis ... <radiology> Idiopathic, familial hypertrophic osteoarthropathy, boys at puberty, blacks more than whites, familial, periosteal reaction, thick skin: extremities and forehead, hyperhidrosis, relatively pain free ... (12 Dec 1998) ...

pachyglossia
An enlarged thick tongue. ... Origin: pachy-+ G. Glossa, tongue ... (05 Mar 2000) ...

pachygnathous
Characterised by a large or thick jaw. ... Origin: pachy-+ G. Gnathos, jaw ... (05 Mar 2000) ...

pachygyria
Condition in which the convolutions of the cerebral cortex are abnormally large; there are fewer sulci than normal and in some cases the amount of brain substance is somewhat increased. ... Synonym: macrogyria. ... Origin: pachy-+ G. Gyros, circle ... (05 Mar 2000) ...

pachyhymenia
Synonym: pachymenia. ... Origin: pachy-+ G. Hymen, membrane ... (05 Mar 2000) ...

pachyhymenic
Synonym for pachymenic ... Marked by or relating to pachymenia. ... Synonym: pachyhymenic. ... (05 Mar 2000) ...

pachyleptomeningitis
Inflammation of all the membranes of the brain or spinal cord. ... Origin: G. Pachys, thick, + leptos, thin, + meninx (mening-), membrane, + -itis, inflammation ... (05 Mar 2000) ...

pachylosis
A condition of roughness, dryness and thickening of the skin, usually on the lower extremities. ... Origin: G. Pachylos, rather coarse ... (05 Mar 2000) ...

pachymenia
Thickening of the skin or contiguous membranes. ... Synonym: pachyhymenia. ... Origin: pachy-+ G. Hymen, a membrane ... (05 Mar 2000) ...

pachymenic
Marked by or relating to pachymenia. ... Synonym: pachyhymenic. ... (05 Mar 2000) ...

pachymeningitis externa
Inflammation of the outer surface of the dura mater. ... Synonym: epidural meningitis, external meningitis. ... (05 Mar 2000) ...

pachymeningitis interna
Inflammation of the inner surface of the dura mater. ... Synonym: internal meningitis. ... (05 Mar 2000) ...

pachymeningopathy
Disease of the dura mater. ... Origin: pachy-+ G. Meninx (mening-), membrane, + pathos, disease ... (05 Mar 2000) ...

pachymeninx
The dura mater. ... Origin: pachy-+ G. Meninx, membrane ... (05 Mar 2000) ...