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Table 1 Variance component analysis.

From: Placental biomarkers of phthalate effects on mRNA transcription: application in epidemiologic research

  a) Cyclophilin b) 18S rRNA c) total RNA
  PPARγ CYP19 PPARγ CYP19 PPARγ CYP19
By sample number (n = 12/placenta)
   Between 1% 8% 36% 46% 26% 37%
   Within 99% 92% 64% 54% 74% 63%
By quadrant (n = 4/placenta)
   Between 9% 14% 53% 67% 50% 66%
   Within 91% 86% 47% 33% 50% 34%
By region (n = 2/placenta)
   Between 0% 43% 81% 84% 49% 77%
   Within 100% 57% 19% 16% 51% 23%
  1. Results vary when the target mRNA is adjusted by a) CYC; b) 18S rRNA; and c) total RNA.