Bioinformatics for Beginners – File formats: Part 1. Reference sequences

The most widely used file format for reference sequences is the fasta format. Both nucleotide and protein sequences can be represented in fasta format.

A fasta formatted file begins with a single-line description, followed by the sequence data. The description line starts with a greater-than (“>”) symbol. In the next line, the nucleotide or protein sequence starts. This sequence can be in a single line, but usually it’s broken into shorter, uniform length lines. Coding of the sequences follows the IUPAC code.

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Omixon on LinkedIn!

We see amazing potential in using social media channels for spreading the word about next generation sequencing, HLA typing and bioinformatics in general. This is why we have been writing this blog, updating the Facebook and Twitter channels and now we open a new channel on LinkedIn.

We hope to see you there too!

Omixon on LinkedIn!

Flashcard Fridays – Comparison of variant callers

A survey of tools for variant analysis of next-generation genome sequencing data. Pabinger et al. 2013

Following last week”s variant caller themed FF post, I will present you a very great article about variant detection and annotation. The paper gives a great review of basically every aspect of NGS based variant detection from a whole NGS analysis workflow and available tools to specific problems (e.g. detection of somatic mutations).

My favourite part is Figure 2, which illustrates perfectly, that there is no perfect variant caller around, even for germline mutations. Each tool finds (and misses) a different set of variants.

Flashcard Fridays - Comparison of variant callers

Figure 2 from Pabinger et al. 2013: Venn diagrams showing the number of identified variants for tested germline (A), somatic (B), CNV (C) and exome CNV (D) tools. The depicted numbers in (A) and (B) report identified SNPs and INDELs.

Omixon’s upcoming HLA typing webinar

Broadcast date: 3rd July 2013, Wednesday

Time: 12.00-1.00 PM EDT/ 18.00-19.00 CET

Come and join our CEO, Attila Berces online in a presentation and demo of how Omixon Target HLA typing will bring you value during the analysis of NGS data.

Our guest speaker is Dr. Dimitri Monos, University of Pennsylvania and The Children”s Hospital of Philadelphia, who will talk about his experiences with HLA typing protocol development on NGS platform.

Currently, there are 69 on-going clinical trials investigating HLA as a potential biomarker for safety or efficacy.  It appears that beside being the most important marker in transplantation, HLA is becoming a more important biomarker for cancer therapeutic development as well. The analytical performance of NGS-based genetic tests highly depends on the bioinformatics software. Although the current false variant rate can be acceptable for research market, it is simply unsuitable for making clinical decisions. Omixon tailors the analysis for the sequencer, amplification method, primer kit, and the characteristics of the gene target itself.  This approach results in a robust and highly accurate method to identify genetic variants.

Register today!

In this webinar you will learn:

  • How to reduce ambiguity and increase resolution
  • How to achieve the highest accuracy
  • How to use Omixon Target HLA as an HLA-typing tool
  • How to increase efficiency by reducing effort, time and cost

Who should attend?

  • Scientists and researchers from HLA-typing labs
  • Molecular biologists working with NGS
  • Medical professionals working in transplantation,oncology and immunology
  • Bioinformathics working in transplantaion, oncology and immunology

Presenting:

  • Dr. Dimitri Monos
  • Attila Berces, PhD

A live Q&A session will follow the presentation, offering you the opportunity to put forward your questions.

Reserve your webinar seat here.

Omixon's upcoming HLA typing webinar