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On the origin of molecular "handedness" in living systems

Noyes, H P ; Bonner, W A

J. Mol. Evol.; (United States), 1975-01, Vol.6 (2), p.91-98 [Periódico revisado por pares]

Germany

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Título:
On the origin of molecular "handedness" in living systems
Autor: Noyes, H P ; Bonner, W A
Assuntos: ASYMMETRY ; BASIC BIOLOGICAL SCIENCES ; BIOLOGICAL EVOLUTION ; BIOLOGY ; Catalysis ; CHALCOGENIDES ; Chemical Phenomena ; Chemistry ; CHIRALITY ; Elementary Particles ; ENANTIOMORPHS ; Ferredoxins - analysis ; Ferric Compounds ; GEOMAGNETIC FIELD ; IGNEOUS ROCKS ; IRON COMPOUNDS ; IRON ORES ; IRON OXIDES ; Isomerism ; LAVA ; MAGNETIC FIELDS ; Magnetics ; MAGNETITE ; MINERALS ; Models, Chemical ; MOLECULES ; OPTICAL ACTIVITY ; ORES ; ORIGIN ; Origin of Life ; OXIDES ; OXYGEN COMPOUNDS ; PARITY ; PARTICLE PROPERTIES ; ROCKS ; Space life sciences ; TRANSITION ELEMENT COMPOUNDS ; Ultraviolet Rays ; VOLCANIC ROCKS 550200 -- Biochemistry
É parte de: J. Mol. Evol.; (United States), 1975-01, Vol.6 (2), p.91-98
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: Elementary particle effects (beta-decay) provide at best only a weakly handed radiation in the biologically effective energy ranges. Global magnetic effects coupled to sunlight are randomized by paleomagnetic reversals. Hence a persistent terrestrial handed bias at possible local biopoetic sites offers a more promising explanation for the origin of the "handedness" of the molecules found among living systems on earth. Magnetite in lava flows maintains a handed bias for surface catalysis through many magnetic reversals. Magnetite contaminated with sulfur has already been proposed by Granick as a biopoetic site because it provides a weak source of chemical energy derived by photochemical conversion. Indirect evidence for this hypothesis has been provided by the molecular structure of ferredoxin - a single strand of the 14 primordial amino acids wrapped around an FeS core. Lava flows have been suggested as biopoetic sites by Fox, since their temperature and chemical composition might allow for the rapid synthesis of prebiotic compounds at the surface of the primitive earth. The additional fact that magnetite in lave flows also provides a persistent handed site for surface catalysis offers a further argument for the experimental investigation of this specific biopoetic environment.
Editor: Germany
Idioma: Inglês

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On the origin of molecular "handedness" in living systems

Noyes, H P ; Bonner, W A

Germany

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