| 释义 |
carboxy-|kɑːˈbɒksɪ|
comb. form of carboxyl; as in carboxy-hæmoglobin, a combination of carbon monoxide and hæmoglobin formed in the blood when carbon monoxide is inhaled; carboxy-(poly)peptidase, an enzyme (e.g. in the pancreas) that hydrolyses peptides and polypeptides by removing the amino acids containing free carboxyl groups.
1891Jrnl. Chem. Soc. LX. 1522 Conversion of carboxy-hæmoglobin into methæmoglobin, and detection of carbonic oxide in blood. 1908Practitioner Dec. 842 Carbon-monoxide has a marked affinity for the colouring matter of the blood, and forms carboxy-haemoglobin, the chief characteristic of which is stability. 1962Lancet 13 Jan. 68/1 Each animal was gassed until the blood-level of carboxyhaemoglobin was 70%.
1930Chem. Abstr. 1129 Proteinase and carboxy⁓polypeptidase of the pancreas. 1935Science LXXXI. 467/1 Carboxypolypeptidase splits the amide linkages of certain amino-acid compounds, such as chloracetyl tyrosine,..with the liberation in each case of an amino-acid which in the intact compound has a free carboxyl group. 1940Chem. Abstr. 2397 Ext[ract]s of pancreas contg. carboxypeptidase were subjected to adsorption. 1955Sci. Amer. July 78/2 The enzyme carboxypeptidase..removes amino acids from the ends of protein chains. 1956Nature 17 Mar. 527/2 Treatment with carboxypeptidase..revealed leucine as the C-terminal amino-acid.
Add: carboxyˈdismutase, an enzyme found in autotrophic plants which catalyses the addition of a molecule of carbon dioxide to one of ribulose bisphosphate; ribulose bisphosphate carboxylase.
1956M. Calvin in Proc. 3rd Internat. Congr. Biochem. 218 Because the carboxylation reaction takes place at the expense of the oxidation of the C3 of the ribulose to the carboxyl level, the name ‘carboxydismutase’ suggests itself as uniquely descriptive. 1976Bell & Coombe tr. Strasburger's Textbk. Bot. (rev. ed.) 250 A molecule of carbon dioxide becomes bound by a special enzyme, carboxydismutase (ribulose diphosphate carboxylase), to a molecule of the ribulose diphosphate. 1986Phil. Trans. R. Soc. B. CCCXIII. 306 In the early 1970s carboxydismutase (or ribulose diphosphate carboxylase) as it was then called, was still an unresolved enigma. |