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. 2006 Dec 4;6:9. doi: 10.1186/1472-6890-6-9

Table 2.

Results for RNA Obtained from Formalin-fixed, Paraffin-embedded Tissue Specimens

Cryopreserved FFPE Tissue


Sample Type Tissue Asterand Quality Grade RIN for Cryoa RIN for FFPEa RNA conc (ng/uL) PCR Ctb # Genes Detectedc Correlation of Replicates (R2) d
1 Kidney Normal Passed 9.2 2.4 153 30 438 0.91
2 Kidney Normal Passed 8.9 2.3 120 25 452 0.98
3 Stomach Normal Passed 8.8 2.4 88 31 310 0.86

Passing RNA Ave 9.0 2.4 120 29 400 0.92

4 Breast Tumor Failed 2.3 1.9 119 30 426 0.95
5 Breast Tumor Failed 2.5 1.2 71 25 338 0.78
6 Lung Tumor Failed 2.4 1.0 54 29 457 0.64
7 Kidney Normal Failed 2.4 2.3 87 32 420 0.91
8 Kidney Normal Failed 2.7 2.3 61 30 229 0.91
9 Kidney Normal Failed NA 2.6 133 32 377 0.69
10 Kidney Normal Failed 2.4 2.4 41 32 164 0.56

Failing RNA Ave 2.5 2.0 81 30 344.4 0.78

NA = Not Available

a RNA Integrity number as assessed by 2100 Bioanalyzer

b Cycle threshold of amplification of RPL-13a, results compared to Ct of intact total RNA

c Genes detected over background by Beadstudio software with a certainty of p = 0.99

d Technical replicates of same RNA extraction run in separate array experiments