Skews from custom sequences

Name of sequence:
Copy sequence in the textarea below (up to 5,000,000 bp):

Window size or bases(100-50000)

Show G+C %
Show GC-skew
Show AT-skew
Show KETO-skew
Show oligo-skew for in
Show subsequence: from to
This is simplified script extracted from the online tools at
You may also use it in this server

Source code is available at