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Wednesday, February 26, 2020

Application specific barcoding strategies for SMRT Sequencing

Over the last few years, several advances were implemented in the PacBio RS II System to maximize throughput and efficiency while reducing the cost per sample. The number of useable bases per SMRT Cell now exceeds 1 Gb with the latest P6-C4 chemistry and 6-hour movies. For applications such as microbial sequencing, targeted sequencing, Iso-Seq (full-length isoform sequencing) and Nimblegen’s target enrichment method, current SMRT Cell yields could be an excess relative to project requirements. To this end, barcoding is a viable option for multiplexing samples. For microbial sequencing, multiplexing can be accomplished by tagging sheared genomic DNA during library…

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Wednesday, February 26, 2020

Multiplexing strategies for microbial whole genome SMRT Sequencing

The increased throughput of the RS II and Sequel Systems enables multiple microbes to be sequenced on a single SMRT Cell. This multiplexing can be readily achieved by simply incorporating a unique barcode for each microbe into the SMRTbell adapters after shearing genomic DNA using a streamlined library construction process. Incorporating a barcode without the requirement for PCR amplification prevents the loss of epigenetic information (e.g., methylation signatures), and the generation of chimeric sequences, while the modified protocol eliminates the need to build several individual SMRTbell libraries. We multiplexed up to 8 unique strains of H. pylori. Each strain was…

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Wednesday, February 26, 2020

Application-specific barcoding strategies for SMRT Sequencing

The increased sequencing throughput creates a need for multiplexing for several applications. We are here detailing different barcoding strategies for microbial sequencing, targeted sequencing, Iso-Seq full-length isoform sequencing, and Roche NimbleGen’s target enrichment method.

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Wednesday, February 26, 2020

Multiplexing strategies for microbial whole genome SMRT Sequencing

As the throughput of the PacBio Systems continues to increase, so has the desire to fully utilize SMRT Cell sequencing capacity to multiplex microbes for whole genome sequencing. Multiplexing is readily achieved by incorporating a unique barcode for each microbe into the SMRTbell adapters and using a streamlined library preparation process. Incorporating barcodes without PCR amplification prevents the loss of epigenetic information and the generation of chimeric sequences, while eliminating the need to generate separate SMRTbell libraries. We multiplexed the genomes of up to 8 unique strains of H. pylori. Each genome was sheared and processed through adapter ligation in…

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Wednesday, February 26, 2020

Multiplexing strategies for microbial whole genome sequencing using the Sequel System

For microbial sequencing on the PacBio Sequel System, the current yield per SMRT Cell is in excess relative to project requirements. Multiplexing offers a viable solution; greatly increasing throughput, efficiency, and reducing costs per genome. This approach is achieved by incorporating a unique barcode for each microbial sample into the SMRTbell adapters and using a streamlined library preparation process. To demonstrate performance,12 unique barcodes assigned to B. subtilis and sequenced on a single SMRT Cell. To further demonstrate the applicability of this method, we multiplexed the genomes of 16 strains of H. pylori. Each DNA was sheared to 10 kb,…

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