Table 3

Dynamic range of E2, E6 and HMBS quantification by qPCR.

Template DNA per μl
Expected quantification in 2 μl
Observed quantification with percent change over expected




E2
E6
HMBS
E2/E6
E6 per diploid genome
E2
E6
HMBS
E2/E6
E6 per diploid genome











51 ng gDNA 10 pg pSP64 HPV16
760,000
760,000
28,571
1
53
893,063
+17.5%
616,115
-18.9%
49,816
+74.4%
1.4
25
11 ng gDNA 2.16 pg pSP64 HPV16
163,922
163,922
6,163
1
53
208,404
+27.1%
172,423
+5.2%
7,437
+20.7%
1.2
46
3 ng gDNA 60 fg pSP64 HPV16
44,665
44,665
1,679
1
53
26,956
-39.7%
40,597
-9.1%
1,047
+37.6%
0.7
78

Peripheral blood lymphocyte gDNA was spiked with a known quantity of HPV16 DNA (in the pSP64-HPV16 plasmid). The template DNA was serially diluted, and absolute amounts were measured by spectrophotometry. The template DNA values are given in the first column of the Table. The anticipated gene copy numbers for E2, E6 and HMBS were derived, and are shown in the 'Expected quantification' section. qPCR of the serially diluted samples was performed, and the observed gene copy numbers are reported in the 'Observed quantification' section.

Roberts et al. BMC Biotechnology 2008 8:57   doi:10.1186/1472-6750-8-57