I'm working with RNA-seq data and I'm trying to find a very specific splice form of a certain gene and the type of splicing is alternative polyadenylation. I've been working with MATS and Olego/Quantas but as stated in their documentation, they only look for skipped/cassette exons, alternative 5' splice sites, alternative 3' splice sites, mutually exclusive exons, and retained introns. Does anyone know of a program I can use to specifically look for alternative polyadenylation splicing? Or if there is a quick fix to modify these other programs to look for it? Thanks!