| 释义 |
phosphagen Biochem.|ˈfɒsfədʒən|
[f. phosphate + -gen.]
An organic phosphate in muscle tissue (in vertebrates, creatine phosphate) whose phosphate group is readily released and transferred to adenosine diphosphate, thereby forming the triphosphate needed for muscular contraction.
1927P. & M. G. Eggleton in Nature 5 Feb. 194/2 There appears to be in muscle tissue an organic phosphorus compound which, by reason of its great instability in acid solution, has been confused hitherto with inorganic phosphate... The confusion is increased by the fact that this substance, the organic phosphorus compound which we have designated ‘phosphagen’, is intimately connected with the chemical mechanism of contraction. 1937Best & Taylor Physiol. Basis Med. Pract. liii. 971 In the presence of oxygen the phosphoric acid and creatine are resynthesized to phosphagen. 1965New Scientist 18 Feb. 445/1 So far, animal tissues have been found to contain organic compounds, N-phosphorylated guanidines, whereas plants and microorganisms contain only inorganic polyphosphates. This clear distinction between the two characteristic types of ‘phosphagen’ seems to offer a basis for deciding whether a particular organism is a plant or an animal. 1972J. A. Wilson Princ. Animal Physiol. v. 141/1 Several other phosphagens have been found in the annelids. |