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Evolution of major metabolic innovations in the PrecambrianA combination of information on the metabolic capabilities of prokaryotes with a composite phylogenetic tree depicting an overview of prokaryote evolution based on the sequences of bacterial ferredoxin, 2Fe-2S ferredoxin, 5S ribosomal RNA, and c-type cytochromes shows three zones of major metabolic innovation in the Precambrian. The middle of these, which reflects the genesis of oxygen-releasing photosynthesis and aerobic respiration, links metabolic innovations of the anaerobic stem on the one hand and, on the other, proliferation of aerobic bacteria and the symbiotic associations leading to the eukaryotes. Those pathways where information on the structure of the enzymes is known are especially considered. Halobacterium and Thermoplasma (archaebacteria) do not belong to a totally independent line on the basis of the composite tree but branch from the eukaryote cytoplasmic line.
Document ID
19820054586
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Barnabas, J. (Georgetown University Medical Center Washington, DC; Ahmednagar College, Ahmednagar, India)
Schwartz, R. M. (Georgetown Univ. Washington, DC, United States)
Dayhoff, M. O. (Georgetown University Medical Center Washington, DC, United States)
Date Acquired
August 10, 2013
Publication Date
March 1, 1982
Publication Information
Publication: Origins of Life
Volume: 12
Subject Category
LIFE SCIENCES (GENERAL)
Funding Number(s)
CONTRACT_GRANT: NIH-GM-08710
CONTRACT_GRANT: NASW-3317
Distribution Limits
Public
Copyright
Other