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    • Alkenone producers inferred from well-preserved 18S rDNA in Greenland lake sediments 

      D'Andrea, William J.; Lage, Melissa; Martiny, Jennifer B. H.; Laatsch, Abby D.; Amaral-Zettler, Linda A.; Sogin, Mitchell L.; Huang, Yongsong (American Geophysical Union, 2006-09-19)
      The 18S ribosomal DNA (rDNA) sequences of haptophyte algae were successfully amplified using the polymerase chain reaction (PCR) from water filtrate, surface sediments, and a late-Holocene sediment sample (∼1000 years old) ...