Genome Browser Bug

Here I describe a bug in the UCSC Genome Browser display that I found this morning. When locating a SNP on the human genome (where I have only surrounding sequence) I usually do a quick BLAT search of my sequence with the SNP base being deleted. This will show up as 1 bp gap that can be easily matched to exon-intron structure or reading frame. Occasionally, however, there is a +1 bp offset of my artifical gapwhich would let me draw wrong conclusions. My BLAT search below has the name “rs2067694” and shoudl match the SNP indicated in the bottom line.

ucsc_bug2.png

If you want to use my settings, cut & paste “http://www.wjst.de/wjst_snp.ini” into this linked page.