The following picture is a snapshot of the RefSeq Genes track (collapsed) on IGV. I know that the bold blue line indicates exons and the thin one indicates introns.
However, I cannot find what the medium line stands for. Is it part of the exon? Why is it different?
I have checked into the manual but I couldn't find any relevant info.
When you expand the track (bottom picture) even more diverse lines appear.
- medium blue line without arrows
- medium line with arrows
- bold line with arrows
Can anyone explain to me what is the difference between all of them?