Frequency of nucleotides and oligonucleotides in a sequence
This demo is limited to oligos 1-3 bases long, and a maximum input sequence of 10000 bp.
Copy your sequence in the textarea below
(non coding characters, as number, returns or spaces will be removed)
Select length of oligonucleotides
Compute frequencies in
This version does not work with degenerated nucleotides
* when selected length is one, frequency of nucleotides A, C, G and T will be reported.
Source code is freely downloable at