| carboxamidopeptidase | <enzyme> Has both trypsin and chymotrypsin-like activities; neurohypophyseal hormone inactivating peptidase from toad skin Registry number: EC 3.4.21.- (26 Jun 1999) |
|---|---|
| carboximide | See: carboxamide. (05 Mar 2000) |
| carboxin | <chemical> A systemic agricultural fungicide and seed treatment agent. Pharmacological action: fungicides, industrial. Chemical name: 1,4-Oxathiin-3-carboxamide, 5,6-dihydro-2-methyl-N-phenyl- (12 Dec 1998) |
| carboxy terminal | The end of a peptide or protein having a free carboxyl (-COOH) group. (05 Mar 2000) |
| carboxy- | Combining form indicating addition of CO or CO2. (05 Mar 2000) |
| carboxy-lyases | <enzyme> Enzymes that catalyze the nonhydrolytic addition or removal of a carboxyl group to or from a compound. They include the carboxylases and decarboxylases. Registry number: EC 4.1.1. (12 Dec 1998) |
| carboxy-terminal domain kinase | <enzyme> Protein kinase that phosphorylates the c-terminal repeat domain of the largest subunit of RNA polymerase II at serine residues Registry number: EC 2.7.1.- Synonym: ctd kinase, hs-ctd kinase, tfiih-associated ctd kinase (26 Jun 1999) |
| carboxycathepsin | <enzyme> A hydrolase cleaving C-terminal dipeptides from a variety of substrates, including angiotensin I, which is converted to angiotensin II and histidylleucine. An important step in the metabolism of certain vasopressor agents. It is a chloride-dependent, zinc glycoprotein that is generally membrane-bound and active at neutral pH. Only single dipeptides are released from angiotensin I and bradykinin because of the lack of activity on bonds involving proline. It may also have endopeptidase activity on some substrates. Registry number: EC 3.4.15.1 Synonym: carboxycathepsin, dipeptidyl carboxypeptidase, kinase II, peptidase P. (22 Sep 2002) |
| carboxydismutase | A dimerizing carboxy-lyase; an enzyme that catalyses the addition of carbon dioxide to d-ribulose 1,5-bisphosphate and the hydrolysis of the addition product to two molecules of 3-d-phosphoglyceric acid, a key reaction in the fixation of CO2 in photosynthesis. Synonym: carboxydismutase. (05 Mar 2000) |
| carboxyhaemoglobin | <protein> A blood test which is performed on an arterial specimen and is a measurement of the amount of carbon monoxide which is present and bound to haemoglobin. This is an important test to diagnosis carbon monoxide toxicity (smoke inhalation). Normal carboxyhaemoglobin may be from 3% to as high as 12% in heavy smokers. Symptoms of carbon monoxide poisoning begin at about 20% carboxyhaemoglobin. (27 Sep 1997) |
| carboxyhemoglobin | <chemical> Chemical name: Haemoglobins, carbonyl- (12 Dec 1998) |
| carboxyhemoglobinaemia | Presenc e of carboxyhemoglobin in the blood, as in carbon monoxide poisoning. (05 Mar 2000) |
| carboxyl | The characterizing group (-COOH) of certain organic acids; e.g., HCOOH (formic acid), CH3COOH (acetic acid), CH3CH(NH2)COOH (alanine), etc. Compare: carboxylic acid. (05 Mar 2000) |
| carboxyl and carbamoyl transferases | <enzyme> A group of enzymes that catalyze the transfer of carboxyl- or carbamoyl- groups. Registry number: EC 2.1.3 (12 Dec 1998) |
| carboxyl group | -COOH group. One of the oxygens is double-bonded to the carbon atom, making it a carbonyl group, and the other oxygen is single bonded to the carbon on one side, and single bonded to the hydrogen on the other. The remaining bond on the carbon atom is attached to the rest of the molecule. Organic molecules containing carboxyl groups are an important, major group of compounds studied in the field of organic chemistry. (09 Oct 1997) |