0:17 - Set up the Genome Browser display. 0:34 - View alternate sequences. 1:44 - Fetch sequence of right end of alt. 2:55 - Fetch sequence of left end of alt. 3:18 - Blat the alt ends. 4:37 - Substitute alt ends into chromosome. 6:10 - Track lifted from hg19 lacks hg38 annotations on alt. 6:31 - Remove alt from main chromosome.