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Table 7 Cycle threshold values (CT) for endogenous controls are different in tumors and normal tissues

From: Small nucleolar RNA U91 is a new internal control for accurate microRNAs quantification in pancreatic cancer

CT values shift (n) between tumors and normal tissues Internal controls
Spike U6 miR-16 U91
Min 0,61 5,02 5,80 1,90
Max −0,70 −5,79 −6,20 −2,06
Average ± SD −0,13 ± 0,251 −1,23 ± 1,127 −0,78 ± 1,315 −0,36 ± 0,833
  1. These values are often shifted ± n cycles in tumors. It means that expression of endogenous control genes can vary in tumors