| proton acceptor | <chemistry> A base, an anionic substance that acceptsa proton during an acid-basereaction. (09 Oct 1997) |
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| proton ATPase | <enzyme> An ion pump that actively transports hydrogen ions across lipid bilayers in exchange for ATP. Major groups are the F-type ATPases, that run in reverse to synthesise ATP in bacterial, mitochondrial and chloroplast membranes (ATP synthase) and the V-type ATPases found in intracellular vesicles with an acidic lumen and on certain epithelial cells (e.g. Kidney intercalated cells). Gastric H/K ATPase is a proton ATPase. (18 Nov 1997) |
| proton donor | <chemistry> An acid, a susbstance that donates protons in an acid-base reduction reaction. (10 Jan 1998) |
| proton pump | Integral membrane proteins that transport protons across a membrane against a concentration gradient. This transport is driven by hydrolysis of ATP by hydrogen-transporting ATP synthase. (12 Dec 1998) |
| proton pump inhibitor | <pharmacology> A group of anti-ulcer medications which work by binding to H+/K+ ATPase, an enzyme which is found on the secretory surface of parietal cells. It thereby inhibits the final transport of hydrogen ions (via exchange with potasium) into the gastric lumen. Examples of proton pump inhibitors include omeprazole and lansoprazole. (27 Sep 1997) |
| proton-motive force | Energy that is generated by the transfer of protons or electrons across an energy-transducing membrane and that can be used for chemical, osmotic, or mechanical work. Proton-motive force can be generated by a variety of phenomena including the operation of an electron transport chain, illumination of a purple membrane, and the hydrolysis of ATP by a proton atpase. (12 Dec 1998) |
| protonema | Origin: NL, fr. Gr. First +, a thread. <botany> The primary growth from the spore of a moss, usually consisting of branching confervoid filaments, on any part of which stem and leaf buds may be developed. Source: Websters Dictionary (01 Mar 1998) |
| protoneuron | Hypothetical primitive neuron lacking polarization. Origin: proto-+ G. Neuron, nerve (05 Mar 2000) |
| protonophore | <cell biology> Ionophore that carries protons. Many uncouplers are protonophores. (18 Nov 1997) |
| protonotary | Pl> -ries . [LL. Protonotarius, fr. Gr. Prw^tos first + L. Notarius a shorthand writer, a scribe: cf. F. Protonotaire. 1. A chief notary or clerk. " My private prothonotary." 2. Formerly, a chief clerk in the Court of King's Bench and in the Court of Common Pleas, now superseded by the master. 3. A register or chief clerk of a court in certain States of the United States. 4. Formerly, one who had the charge of writing the acts of the martyrs, and the circumstances of their death; now, one of twelve persons, constituting a college in the Roman Curia, whose office is to register pontifical acts and to make and preserve the official record of beatifications. 5. The chief secretary of the patriarch of Constantinople. <zoology> Prothonotary warbler, a small American warbler (Protonotaria citrea). The general colour is golden yellow, the back is olivaceous, the rump and tail are ash-colour, several outer tail feathers are partly white. Source: Websters Dictionary (01 Mar 1998) |
| protons | Stable elementary particles having the smallest known positive charge, found in the nuclei of all elements. The proton mass is less than that of a neutron. A proton is the nucleus of the light hydrogen atom, i.e., the hydrogen ion. (12 Dec 1998) |
| protoorganism | <biology> An organism whose nature is so difficult to determine that it might be referred to either the animal or the vegetable kingdom. Origin: Proto- + organism. Source: Websters Dictionary (01 Mar 1998) |
| protopapas | A protopope. Origin: NL, from Gr. A chief priest. Source: Websters Dictionary (01 Mar 1998) |
| protopathic | Denoting a supposedly primitive set or system of peripheral sensory nerve fibres conducting a low order of pain and temperature sensibility which is poorly localised. Compare: epicritic. Origin: proto-+ G. Pathos, suffering (05 Mar 2000) |
| protopathic sensibility | See: protopathic. (05 Mar 2000) |
Synonyms : A-raf Kinase, A-raf Protein Kinase, A-raf-1 Protein, Proto-Oncogene Protein A-raf, A raf 1 Protein, A raf Kinase, A raf Protein Kinase, Kinase, A-raf, Kinase, A-raf Protein, Proteins A-raf, Proto-Oncogene, Proto Oncogene Protein A raf
Synonyms : B-raf Kinases, BRAF Kinases, Proto-Oncogene Protein B-raf, B raf Kinases, B-raf, Proto-Oncogene Protein, B-raf, Proto-Oncogene Proteins, Protein B-raf, Proto-Oncogene, Proteins B-raf, Proto-Oncogene, Proto Oncogene Protein B raf, Proto Oncogene Proteins B raf
Synonyms : Proto-Oncogene Proteins abl, abl Proto-Oncogene Products, Products, abl Proto-Oncogene, Proteins abl, Proto-Oncogene, Proto Oncogene Proteins abl, Proto Oncogene Proteins c abl, Proto-Oncogene Products, abl, Proto-Oncogene Proteins, abl, c abl Proteins
Synonyms : AKT1 Protein Kinase, AKT2 Protein Kinase, AKT3 Protein Kinase, Akt-alpha Protein, Akt-beta Protein, Akt-gamma Protein, Protein Kinase B, Protein Kinase B alpha, Protein Kinase B beta, Protein Kinase B gamma, Protein-Serine-Threonine Kinase (Rac), RAC-PK Protein
Synonyms : B-Cell Leukemia 2 Family Proteins, B Cell Leukemia 2 Family Proteins, Proto Oncogene Proteins c bcl 2, Proto-Oncogene Proteins, bcl-2, bcl 2 Proto Oncogene Proteins, c bcl 2 Proteins, c-bcl-2, Proto-Oncogene Proteins
| Prototheca |
(Pro
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| protothecosis |
(pro
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| Prototheria |
(Pro
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| Prototunicatae |
(Pro
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| protoveratrine |
(pro
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