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Table 1 Summary of nuclear DNA quantification by real time PCR depending on different substrates.

From: Human evolution in Siberia: from frozen bodies to ancient DNA

  Substrates
  Bones Teeth Hairs
Number of samples 64 18 12
Number of DNA extracts quantified 133 18 41
Mean quantity of DNA (minimum-maximum observed) 0.23 ng.μl-1 (0-2.32 ng) 0.56 ng.μl-1 (0.003-1.54 ng) 0.12 ng.μl-1 0-0.945 ng)
Frequency of DNA extracts yielding a DNA concentration > 500 pg.μl-1 18.86% 50% 7.30%
Frequency of DNA extracts yielding a DNA concentration comprised between 500 and 100 pg.μl-1 18.86% 38.90% 19.50%
Frequency of DNA extracts yielding a DNA concentration below the detection limit 20.30% 5.5% 19.50%
Frequency of DNA extracts containing PCR inhibitors 8.27% 0 0