Intron splice site compilation

[LEDIZET at MSVAX.MSSM.EDU]

Dear netters

I would like to compile a consensus of intron splice site sequences
from many GenBank sequences.
Does anybody know of software that would read the splice site location
from the sequence header and "extract" the surrounding DNA sequence?

Thanks for your help.

Michel LeDizet
The Mount Sinai School of Medicine, New York
ledizet at msvax.mssm.edu