Molecular coproscopy: dung and diet of the extinct ground sloth Nothrotheriops shastensis - PubMed (original) (raw)

Molecular coproscopy: dung and diet of the extinct ground sloth Nothrotheriops shastensis

H N Poinar et al. Science. 1998.

Abstract

DNA from excrements can be amplified by means of the polymerase chain reaction. However, this has not been possible with ancient feces. Cross-links between reducing sugars and amino groups were shown to exist in a Pleistocene coprolite from Gypsum Cave, Nevada. A chemical agent, N-phenacylthiazolium bromide, that cleaves such cross-links made it possible to amplify DNA sequences. Analyses of these DNA sequences showed that the coprolite is derived from an extinct sloth, presumably the Shasta ground sloth Nothrotheriops shastensis. Plant DNA sequences from seven groups of plants were identified in the coprolite. The plant assemblage that formed part of the sloth's diet exists today at elevations about 800 meters higher than the cave.

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Comment in

• A fruitful scoop for ancient DNA.
  Stokstad E. Stokstad E. Science. 1998 Jul 17;281(5375):319-20. doi: 10.1126/science.281.5375.319b. Science. 1998. PMID: 9705702 No abstract available.

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