منابع مشابه
Prebiotic metabolic networks?
A prebiotic origin of metabolism has been proposed as one of several scenarios for the origin of life. In their recent work, Ralser and colleagues (Keller et al, 2014) observe an enzyme-free, metabolism-like reaction network under conditions reproducing a possible prebiotic environment.
متن کاملPrebiotic Chemistry: Geochemical Context and Reaction Screening
The origin of life on Earth is widely believed to have required the reactions of organic compounds and their self- and/or environmental organization. What those compounds were remains open to debate, as do the environment in and process or processes by which they became organized. Prebiotic chemistry is the systematic organized study of these phenomena. It is difficult to study poorly defined p...
متن کاملTransketolase reaction under credible prebiotic conditions.
A transketolase reaction was catalyzed by cyanide ion under prebiotic conditions instead of its modern catalyst, thiamine pyrophosphate (TPP). Cyanide ion converted fructose plus glyceraldehyde to erythrose plus xylulose, the same products as are formed in modern biochemistry (but without the phosphate groups on the sugars). Cyanide was actually a better catalyst than was TPP in simple solution...
متن کاملEvolutionary attributes of simulated prebiotic metabolic networks
A metabolism-first scenario for the origin of life entails that as early as replicating entities have emerged prebiotically, they must have constituted relatively complex molecular networks, arising via spontaneous accretion of assemblies of simpler organic molecules. While it is widely accepted that selfcatalysis is a prerequisite for life, considerably less attention has been devoted to netwo...
متن کاملEarly Systems Biology and Prebiotic Networks
Systems Biology constitutes tools and approaches aimed at deciphering complex biological entities. It is assumed that such complexity arose gradually, beginning from a few relatively simple molecules at life’s inception, and culminating with the emergence of composite multicellular organisms billions of years later. The main point of the present paper is that very early in the evolution of life...
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ژورنال
عنوان ژورنال: Life
سال: 2020
ISSN: 2075-1729
DOI: 10.3390/life10120352