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NEBNext Ultra II Directional RNA libraries provide uniform GC content distribution, at a broad range of input amounts
Dir_RNA_Libraries_Figure3
Poly(A)-containing mRNA was isolated from Human Universal Reference RNA (Agilent #740000), and libraries were made using the NEBNext Ultra II Directional RNA Kit (plus the NEBNext Poly(A) mRNA Magnetic Isolation Module), Illumina TruSeq Stranded mRNA Kit, Kapa Stranded mRNA-Seq Kit and Kapa mRNA HyperPrep Kit. Libraries were sequenced on an Illumina NextSeq® 500 using paired-end mode (2x76 bp). Reads were mapped to the hg19 reference genome. GC content distribution for each library was calculated using mapped reads. Ultra II Directional RNA libraries had uniform GC content distribution across a range of input amounts, whereas for other kits the GC content distribution changed with different input amounts, indicating the introduction of input-dependent sequence bias.

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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.