Research Article

Differential Expression Analysis for RNA-Seq Data

Table 2

Assessing variability across replicates before and after normalization using the likelihood ratio method on 17708 genes.

Type of normalization Percentage (number) of genes with similar count at different levels
1% 2.5% 5% 10%

No normalization 97.6 (17294) 95.7 (16956) 93.1 (16501) 87.5 (15496)
TMM 99.0 (17540) 97.5 (17272) 95.3 (16887) 90.3 (16007)
Quantile 99.0 (17540) 97.6 (17291) 95.2 (16870) 90.3 (16002)
TPM 86.50 (15318) 86.31 (15284) 85.90 (15212) 84.50 (14964)