| 释义 |
quantasome Bot.|ˈkwɒntəsəʊm|
[f. quanta, pl. of quantum + -some4. (The quantasome was believed to be the fundamental body capable of photosynthesis.)]
One of numerous small proteinaceous particles found in chloroplasts.
Quot. 1962 is only the earliest of several such seeming coinages, all in papers by Professor R. B. Park and his colleagues at the Lawrence Radiation Laboratory and Botany Department, Berkeley, California.
1962M. Calvin in Science 16 Mar. 889/1 Here we can see the lamellae on its flat side showing a granular structure, made up of fairly uniform oblate spheroids which we have called quantasomes. 1964Science 22 May 1009/1 The quantasome as seen in a two-dimensional crystalline array is 185 Å long, 155 Å wide, and 100 Å thick. The surface of the quantasome appears to contain four or more subunits. The molecular weight.. is 2 × 106. This..corresponds to a chlorophyll content of 230 chlorophyll molecules per quantasome. 1968R. Rieger et al. Gloss. Genetics & Cytogenetics 370 According to recent evidence, the quantasomes do not participate in photoreduction reactions but show Ca++ -dependent ATPase activities. 1976Coombs & Greenwood in J. Barber Intact Chloroplast i. 12 The concept of a quantasome as the structural counterpart of a functional photosynthetic unit in the full classical sense of this term is in doubt. |