Are regular illumina poly(a) rna-seq data suitable to study polyadenylation sites?

Question

[Anny]

Hi all!

I have a question about is there a particular requirement for RNA-seq to study poly(A) in a species? I have many rna-seq data using poly(A) based library preparation method, but they are not designed to study alternative polyadenylation problem. From my understanding, the data should harbor all poly(A) information, but I am not sure whether I need an AT-rich designed RNA-seq?

Thank you in advance!