What conditions do I use to anneal the adapters and what concentration is optimal for ligation of adapters to the fragmented genomic DNA.
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I mapped the illumina reads (unpaired reads) using Bowtie2. Now i want to extract the uniquely mapped reads. the formate of mapping summary is...
20000 reads; of these:
20000 (100.00%) were unpaired; of these:
1247 (6.24%) aligned 0 times
18739 (93.69%) aligned exactly 1 time
14 (0.07%) aligned >1 times
93.77% overall alignment rate
So please help me if anyone know that how to extract the uniquely mapped reads..
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It depends on what metrics you want to use to call something uniquely mapped. It's more useful to think of alignments in terms of probability of being correct, which which case just use something like MAPQ>=10. BTW, bowtie2 will give multimappers MAPQ scores of 0 or 1, but that doesn't mean that alignments with MAPQ scores of 2 are that reliable.
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