P7oo is generally believed to be one or a pair of chlorophyll a molecule(s). The recent isolation of a new chlorophyll (chlorophyll-RC1) which has been related quantiatively to the content of P700 in a variety of preparations (1) has raised the possibility that a structurally different ...
The hydrocarbon tail in the case of chlorophyll a is hydrophobic which enables the binding of the molecule to other hydrophobic proteins in the thylakoid membrane of the chloroplast. The biosynthesis of chlorophyll a takes place by the reaction between chlorophyllide a and phytyl diphosphate in the ...
Of the two, cyclooctatetraene proved more accessible. It was first prepared in 1911 by chemical degradation of the alkaloid pseudopelletierine by the German chemist Richard Willstätter. (Willstätter was awarded the 1915 Nobel Prize for Chemistry for his work on the structure of chlorophyll.)...
Although it is unlikely that the structure corresponds to the catalytically active conformation of the enzyme, it represents a novel nucleic acid fold with implications for the Holliday junction structure. 展开 关键词: chlorophyll fluorescence oxidative stress DOI: 10.1038/5839 被引量: 350 ...
The structures also announce a fourth, wholly unexpected haem, that could be the long-sought, missing link of photosystem I cyclic photophosphorylation. One chlorophyll molecule and one carotenoid molecule add to the enigma of this dark, downhill electron transfer complex, linking the real photo...
Nonphotochemical hole burning and pressure-dependent absorption and hole-burning results are presented for the isolated (disaggregated) chlorophyll a/b light-harvesting II trimer antenna complex of green plants. Analysis of the 4.2 K burn-fluence dependent hole spectra and zero-phonon hole action spect...
Amino acids are precursors of a variety of complex nitrogen-containing molecules. Prominent among these are the nitrogenous base components of nucleotides and the nucleic acids (DNA and RNA). Furthermore, there are complex amino-acid derived cofactors such as heme and chlorophyll. Heme is the iron...
--可生产ATP,因此为“powerhouse of the cell” *线粒体含DNA B)Chloroplast 叶绿体 --将光能转换为化学能,因此可被储存于food molecule中 --内含叶绿素chlorophyll--一种绿色色素 --Double membranes,含DNA Support 支持 A)Cytoskeleton 细胞骨架 --A network of thin, fibrous materials that act as a scaffol...
3). First, the tail of chlorophyll CLA815 in pre-PSI-1 is ordered and occupies the space where the head group of β-carotene BCR856 resides in the mature structure. Second, the position of lutein 858 is partially preoccupied by a detergent molecule that probably represents a lipid as a ...