Preserving the original RNA orientation information in RNA-Sequencing (RNA-Seq) experiment is essential to the analysis and understanding of the complexity of mammalian transcriptomes. We describe herein a simple, robust, and time-effective protocol for generating strand-specific RNA-seq libraries suited for the Illumina sequencing platform. We modified the Illumina TruSeq RNA sample preparation by implementing the strand specificity feature using the dUTP method. This protocol uses low amounts of starting material and allows a fast processing within two days. It can be easily implemented and requires only few additional reagents to the original Illumina kit.
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