[BioC] extract introns

[Yating Cheng]

Dear Bioconductor Memebers,

Now I have to extract intron sequences, I have already exon+intron, intron
sequences. Someone told me that I can use Biostring. But I tried, it
failed.

Do you know how to use Biostring to solve this problem, or is there any
other possibility to solve this problem?

Thanks very much.

Best Regards

Yating Cheng