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Sterols in a unicellular relative of the metazoans
Molecular clocks suggest that animals originated well before they first appear as macroscopic fossils, but geologic tests of these hypotheses have been elusive. A rare steroid hydrocarbon, 24-isopropylcholestane, has been hypothesized to be a biomarker for sponges or their immediate ancestors becaus...
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| Autors principals: | , , , , |
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| Format: | Artigo |
| Idioma: | Inglês |
| Publicat: |
National Academy of Sciences
2008
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| Matèries: | |
| Accés en línia: | https://ncbi.nlm.nih.gov/pmc/articles/PMC2481317/ https://ncbi.nlm.nih.gov/pubmed/18632573 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1073/pnas.0803975105 |
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