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Table 4 Effect of incubation time on DNA degradation and RNA detection in the presence of UNGa

From: Quantitative assessment of the effect of uracil-DNA glycosylase on amplicon DNA degradation and RNA amplification in reverse transcription-PCR

  

10 min

20 min

30 min

Analyte (dil.)

Controlc

CT

incr.

CT

incr.

CT

incr.

RNA (undil.)b

21.07

21.79

0.72

22.69

1.62

22.74

1.67

RNA (1:10)

25.80

25.96

0.16

26.83

1.03

27.51

1.71

RNA (1:100)

31.28

31.74

0.46

32.15

0.87

32.78

1.50

RNA (1:1000)

34.81

36.16

1.35

36.01

1.20

35.6

0.79

DNA (1:107)b

21.46

28.19

6.73

32.71

11.25

35.93

14.47

DNA (1:108)

24.73

31.22

6.49

36.52

11.79

No Ct

-

DNA (1:109)

28.08

34.60

6.52

No Ct

-

No Ct

-

DNA (1:1010)

31.14

No Cte

-

No Ct

-

No Ct

-

Mean CT increase for RNA

0.67

 

1.18d

 

1.42d

Mean CT increase for DNA

6.58

 

11.52

 

14.47

  1. a The UNG concentration was 0.25 units per 25 μl reaction and incubation before RT-PCR was performed at 30°C for the indicated times.
  2. b The undiluted RNA sample and the 1:107 dilution of the DNA sample contained 250,000 copies of RNA or DNA, respectively
  3. c Control reactions did not contain UNG and were not incubated prior to RT-PCR
  4. d P < 0.05 by paired t-test compared to control values
  5. e Indicates that amplification was not detected through 40 cycles in each of three replicate reactions