| Autor: |
Rosa-Putra, Surya, Nalin, Renaud, Domenach, Anne-Marie, Rohmer, Michel |
| Předmět: |
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| Zdroj: |
European Journal of Biochemistry; Aug2001, Vol. 268 Issue 15, p4300-4306, 7p, 3 Diagrams |
| Abstrakt: |
Three series of hopanoids, differing by their configurations at C-17 and C-21, have been identified in several Frankia spp. and other related soil bacteria. The widespread bacterial hopanoids of the 17β(H),21β(H) series were accompanied by their isomers of the 17β(H),21α(H) (moretane) and 17α(H), 21β(H) series. The latter series has not previously been found in living organisms and is considered to be a result of the abiotic isomerization of the thermodynamically less stable 17β(H),21β(H) hopanoids. This simultaneous presence of three isomeric hopanoid series highlights intriguing problems in the biogenesis of the bacteriohopane skeleton and partly questions the significance of hopanic biomarkers in sediments. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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