The Origin of Life and Evolutionary Biochemistry

Language: English

Published by Springer Nature B.V. Mär 2012, 2012

1468421174 / 9781468421170

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Neuware - The primary metabolism of protobionts was probably based on the electron transfer reactions regulated by catalysts or photo sensitizing pigments. The action of photoreceptive pigments was inevitable in the case of electron transfer leading to light energy storage in the reaction products. The primitive tetrapyrrolic pig ments formed abiogenically (porphin, chlorin) as well as their more complicated biogenic analogs (chlorophylls) are capable of photo sensitizing electron transfer in systems, having various degrees of molecular complexity. The inorganic photosensitizers (titanium dioxide. zinc oxide. etc.). being excited in the near ultraviolet. are able to perform the same reactions as porphyrins--electron transfer from donor to acceptor molecule (including photoreduction of viologens) or water molecule photooxidation (oxygen liberation). coupled with reduction of ferric compounds and quinones. The in organic photosensitizers are not used in biological evolution; actually the inorganic ions entered into tetrapyrrolic cycle. form ing effective photocatalysts. Inclusion of pigments into primary membranes led to elaborated coupling between pigments and enzymatic systems. The involvement of the excited pigments into the biocata lytic electron transfer chain was prerequisite to effective func tion of photosynthetic organisms. REFERENCES 1. Oparin. A. I., 'Origin of Life on Earth,' Izd. AN SSSR. Moscow. 1957. 2. Gaffron, H., in: 'Horizons in Biochemistry' (Kasha. M and Pullmann, B eds.), p. 59. Academic Press, New York. 1962. 3. Calvin. M 'Chemical Evolution,' C1arendon Press, Oxford. 1969. 4. Pasynsky. A. G . and Pav1ovskaya. T. E . Uspekhii khimii 33, 1198 (1964).

Seller Inventory # 9781468421170

Title
The Origin of Life and Evolutionary Biochemistry
Author
K. Dose
Publisher
Springer Nature B.V. Mär 2012
Publication year
2012
Condition
Neu
Binding
Taschenbuch
Language
English
ISBN 10
1468421174
ISBN 13
9781468421170
Item weight
909 grams
Dimensions
254x178x27 mm

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