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Generating reference from exome sequence data(bam) to map RNA seq(fastq) from the same individual

Is it possible to generate a reference from exome sequenced/aligned(BWA MEM 0.7.10) to map the RNAseq data from the same individual?The idea is to reduce the mapping bias in RNA seq mapping to the common hg19 reference.

I would appreciate some advice/suggestions on tools at different steps.

Thanks in advance

rna-seq exome samtools bwa

Yes, it is possible. This question has already been discussed several times on this forum. Please use the search feature to find them. At the same time I will keep the question open to get some fresh insights into this topic here.

1 answer

If you want to reduce ref bias, I recommend you use a very sensitive aligner such as BBMap rather than mutating the reference in order to align with a less-sensitive aligner. Using a different reference for every experiment can cause major headaches later on when coordinates and base calls no longer match the annotation.

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