Fig. 1

Non-stranded versus stranded RNA-seq protocol. The stranded protocol differs from the non-stranded protocol in two ways. First, during cDNA synthesis, the second-strand synthesis continues as normal except the nucleotide mix includes dUTPs instead of dTTPs. Second, after library preparation, a second-strand digestion step is added. This step ensures that only the first strand survives the subsequent PCR amplification step and hence the strand information of the libraries