Table 1.
Characteristic | DNA sequencing | RNA-seq | |||
---|---|---|---|---|---|
Targeted genomic regions | Whole exome | Whole genome | Targeted | Transcriptome profiling | |
Capture method* | Amplicon-based targeting; hybrid capture; in-solution capture | Hybrid capture; in-solution capture | None | Hybridization only; hybridization and extension; multiplexed PCR | None |
Amount of genome/transcriptome sequenced | ~150 bp – 62 Mb (≤ 2% of genome) | ~30 – 60 Mb (1 – 2% of genome) | ~3 Gb (≥ 95% of genome) | Variable: transcripts of ~10 – 1000 genes | Entire transcriptome |
Amplification | Yes | Yes | Not required | Yes | Required for low-quantity RNA samples |
Sequencing depth | 100 – 1000 ׆ | 80 – 100 ׆ | 30 – 50 ׆ | 0.3 – 25 million reads‡ | 15 – 200 million reads‡ |
Amount of sequence data generated per sample | ~0.3 – 5 Gb | ~4 – 5 Gb | ~90 Gb | ~0.5 – 3 Gb | ~5 – 6 Gb |
bp, base pairs; Mb, megabases; Gb, gigabases; PCR, polymerase chain reaction.
Method used to select genomic regions for sequencing.
Number of times a single base is read during a sequencing run.
A greater number of reads is needed to detect rare transcripts.