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Low input NEBNext Ultra II Directional RNA libraries retain superior complexity
Dir_RNA_Complexity_Figure3
Ribosomal RNA (rRNA) was depleted from Human Universal Reference RNA (Agilent #740000) with recommended amounts of ERCC RNA Spike-In Mix I (Thermo Fisher Scientific #4456740) and libraries were made using 1 µg, 100 ng and 5 ng input with NEBNext Ultra II Directional RNA Kit (plus the NEBNext rRNA Depletion Kit (Human/Mouse/Rat)), and using 1 µg and 100 ng input with Illumina TruSeq Stranded Total RNA Library Prep Kit with Ribo-Zero™ Gold, Kapa Stranded RNA-Seq Kit with RiboErase and Kapa HyperPrep Kit with RiboErase. Libraries were sequenced on an Illumina NextSeq® 500 using paired-end mode (2x76 bp). Salmon 0.6 was used for read mapping and quantification of all ERCC transcripts. TPM (Transcripts Per Kilobase Million) correlation analysis of the synthetic ERCC spike-in indicates superior transcript expression correlation between the different inputs for Ultra II Directional RNA libraries.

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Available Kits:

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NEBNext® Ultra™ II Directional RNA Library Prep Kit for Illumina®
Includes optimized mixes for directional RNA library preparation (fragmentation, cDNA synthesis, end repair/dA-tailing, adaptor ligation and PCR enrichment steps) for sequencing on the Illumina platform.

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NEBNext® Ultra™ II Directional RNA Library Prep with Sample Purification Beads
Includes optimized mixes for directional RNA library preparation (fragmentation, cDNA synthesis, end repair/dA-tailing, adaptor ligation and PCR enrichment steps) plus SPRIselect® beads for size selection and cleanup.