icon_100_ngs

xGen® Exome Research Panel

Deep, uniform coverage of the human exome with best-in-class capture panel

The xGen Exome Research Panel v1.0 consists of 429,826 individually synthesized, and quality controlled xGen Lockdown® Probes. The Exome Research Panel spans a 39 Mb target region (19,396 genes) of the human genome and covers 51 Mb of end-to-end tiled probe space. All probes in the panel are manufactured using GMP standards. Mass spectrometry and OD measurements are taken for each probe to ensure appropriate representation of the correctly manufactured probes in the pool.

  • Obtain consistent results with individually synthesized target capture probes manufactured to GMP standards
  • Achieve deep and uniform coverage even across difficult GC-rich regions
  • Integrate with common sequencing platforms

Ordering

xGen Exome Research Panel v1.0

Exome sequencing is invaluable for sequencing only the coding regions of the human genome. With exons representing only 3% of the genome, it is critical to have an effective method of separating these regions from non-coding DNA to focus on potentially important mutations implicated in disease. The captured material must also be suitable for sequencing to a satisfactory depth of coverage for reliable detection of variant alleles.

The xGen Exome Research Panel consists of 5′ biotin–modified oligonucleotide probes that are individually synthesized and individually analyzed by electrospray ionization mass spectrometry (ESI-MS) and OD measurement. The probes are then normalized before pooling to ensure that each probe is represented in the panel at the correct concentration. Probes that fail quality control are resynthesized. This rigorous manufacturing process gives the xGen Exome Research Panel a unique advantage over array-derived pools, in which missing or truncated probes cannot be identified before sequencing. Using IDT proprietary synthesis methods, even probes with high GC and AT content are appropriately represented in the panel.

To provide increased depth of coverage and enable high multiplexing of samples, the xGen Exome Research Panel targets only the coding sequences (CDS) of human coding genes in the RefSeq database.

Superior on-target coverage and uniformity

Figure 1. Highest on-target performance is achieved by xGen Exome Research Panel. Sequencing libraries were prepared using standard shearing and ligation-based library preparation, and then pooled into a 12-plex. The 12-plex pool was split into four 6 µg aliquots to assess each vendor’s exome panel. Target capture was performed according to each vendor’s recommended protocol. Enriched libraries were sequenced on a HiSeq® 2500 instrument (Illumina) in high output mode using 2 x 100 paired-end reads. On-target bases were determined with Picard (selected bases), using 35M reads per library.

Excellent coverage of RefSeq database with minimal sequencing

Figure 2. Most uniform coverage of exome achieved with xGen Exome Research Panel. (A) Coverage of exons 1 and 2 of RB1 shows that the xGen Exome Research Panel is the only panel to efficiently capture first exons. The xGen exome panel displays no decrease in first exon coverage with increasing sequencing depth. (B) The xGen Exome Research Panel provides the most complete end-to-end gene coverage using 100M reads.

Figure 3. Coverage profile of xGen Exome Research Panel most closely resembles whole genome data. A comparison of coverage depths of different exome panels to coverage depth from whole genome sequencing (WGS) of a matched library shows that the xGen Exome Research Panel provides the closest match to WGS. Analysis of GC content shows that the higher coverage of the xGen panel is driven by the more effective capture of GC content.

User guides and protocols

xGen hybridization capture of DNA libraries for NGS target enrichment (3929 KB)
Automation of xGen hybridization capture on the Sciclone G3 NGS Workstation (2459 KB)

Legacy protocols

PDF tag Hybridization capture of Nextera DNA libraries using xGen Lockdown Probes and Panels (490 KB)
PDF tag Hybridization capture of Nextera DNA libraries using xGen Lockdown Probes and Panels (490 KB)
PDF tag xGen Lockdown Probes and Panels resuspension protocol (664 KB)
PDF tag xGen Lockdown Probes and Panels resuspension protocol (664 KB)
PDF tag Expansion of xGen Lockdown Panels with xGen spike-in panels (681 KB)
PDF tag Expansion of xGen Lockdown Panels with xGen spike-in panels (681 KB)
PDF tag Hybridization capture of TruSeq libraries using xGen Lockdown Probes and Reagents (1960 KB)
PDF tag Hybridization capture of TruSeq libraries using xGen Lockdown Probes and Reagents (1960 KB)

Supplementing xGen Lockdown Panels

Application notes and case studies

PDF tag Multiplexed hybrid capture for whole exome sequencing (328 KB)
PDF tag Multiplexed hybrid capture for whole exome sequencing (328 KB)
PDF tag Lock icon xGen Exome Research Panel—exceptional uniformity and complete coverage

Posters

PDF tag Targeted vs. whole genomes—high quality oligonucleotide capture baits shift the target enrichment landscape (2134 KB)
PDF tag Targeted vs. whole genomes—high quality oligonucleotide capture baits shift the target enrichment landscape (2134 KB)
PDF tag Development of a novel exome capture kit—ACMG 2015—Iowa Institute of Human Genetics (1166 KB)
PDF tag Development of a novel exome capture kit—ACMG 2015—Iowa Institute of Human Genetics (1166 KB)

Certificates of analysis (COAs)

Find COAs by batch or lot number