| proton donor | <chemistry> An acid, a susbstance that donates protons in an acid-base reduction reaction. (10 Jan 1998) |
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| 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 Formerly, a chief clerk in the Court of King's Bench and in the Court of Common Pleas, now superseded by the master. 3.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) |
| protopectin | See: pectin. (05 Mar 2000) |
| protopectinase | <enzyme> A group of enzymes which solubilise protopectin (pectic substances fixed in plant tissues) forming highly polymerised soluble pectin; act either by hydrolysis or trans-elimination; ppases-f, -l, -s, -c and -t have been sequenced Registry number: EC 3.2.1.- Synonym: protopectinase-f, ppase-f, protopectinase-l, ppase-l, protopectinase-s, ppase-s, protopectinase-c, ppase-c, protopectinase-t, ppase-t (26 Jun 1999) |
Synonyms : Proto-Oncogene Protein c-maf, c-maf Proto-Oncogene Protein, Proteins c-maf, Proto-Oncogene, Proto Oncogene Protein c maf, Proto Oncogene Proteins c maf, Proto-Oncogene Protein, c-maf, Proto-Oncogene Protein, maf, c-maf, Proto-Oncogene Protein
Synonyms : Double Minute 2 Protein, MDMX Protein, Mdm-2 Protein, Murine Double Minute 2 Protein, Mdm 2 Protein, Proto Oncogene Proteins c mdm2, Proto-Oncogene Protein, c-mdm2, c mdm2 Proto Oncogene Protein, c-mdm2, Proto-Oncogene Proteins
Synonyms : Receptor, HGF, Receptor, Hepatocyte Growth Factor, Receptor, Scatter Factor, Scatter Factor Receptor, Proto Oncogene Proteins c met, Proto-Oncogene Proteins, met, c met Proteins, met Proto Oncogene Proteins
Synonyms : Proto-Oncogene Products c-mos, Proto-Oncogene Proteins mos, mos Proto-Oncogene Product pp39, pp39 c-mos, Products c-mos, Proto-Oncogene, Proteins c-mos, Proto-Oncogene, Proteins mos, Proto-Oncogene, Proteins, c-mos, Proteins, mos Proto-Oncogene, c mos Proteins
Synonyms : Proto-Oncogene Products c-myb, Proto-Oncogene Protein myb, Proto-Oncogene Proteins myb, c-myb Protein, Proto Oncogene Products c myb, Proto Oncogene Protein myb, Proto Oncogene Proteins c myb, Proto Oncogene Proteins myb, Proto-Oncogene Proteins, myb
| protocaryon |
(pro
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| protocatechuic acid |
(pro
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| protochloride |
(pro
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| protochlorophyll |
(pro
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| protochondral |
(pro
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