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Free-Radical-Induced Mutation vs Redox Regulation: Costs and Benefits of Genes in Organelles
 

Summary: Focus
Free-Radical-Induced Mutation vs Redox Regulation: Costs and Benefits of
Genes in Organelles
John F. Allen,1
John A. Raven2
1
Department of Plant Cell Biology, Lund University, Box 7007, S-220 07 Lund, Sweden
2
Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, UK
Received: 13 November 1995 / Accepted: 6 December 1995
Abstract. The prokaryotic endosymbionts that be-
came plastids and mitochondria contained genes destined
for one of three fates. Genes required for free-living ex-
istence were lost. Most genes useful to the symbiosis
were transferred to the nucleus of the host. Some genes,
a small minority, were retained within the organelle.
Here we suggest that a selective advantage of movement
of genes to the nucleus is decreased mutation: plastids
and mitochondria have high volume-specific rates of re-
dox reactions, producing oxygen free radicals that

  

Source: Allen, John F. - School of Biological and Chemical Sciences, Queen Mary, University of London

 

Collections: Renewable Energy; Biology and Medicine