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CpG Island Searcher

CpG Island Searcher

Current Version:01/21/03
Since 04/15/02 Searched no.:23,693. Total analyzed sequence length:166,512,215 bp.

The CpG island searcher screens for CpG islands which meet the criteria selected below in submitted DNA sequences.
The criteria and algorithm are described by D.T and P.A.J.[PNAS 99(6):3740-5 (2002)]
The CpG island searcher web page was designed by D.Takai.
New! A command-line version of the CpG Island Searcher with no limitation of sequence size is now available. Download
New! A report describes about this web site has been published in In Silico Biol. 3, 0021 (2003).
New! The user can now define the gap to merge two potentialy separate CpG islands. (Please refer the paper above for details)
Note. Current update uses the selected length parameter as a sliding window when initially scanning for CpG islands in the submitted sequence.
The previous version used a sliding 200bp window for initial mapping of the islands.
This change may modify the borders indicated and the number of CpG islands defined.
After submitting, the results will appear at the bottom of this page. Please scroll down to view the results of your submission.
Select the lower limit values
%GC 50% 51% 52% 53% 54% 55% 56% 57% 58% 59% 60%
ObsCpG/ExpCpG 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.70
Length 200bp 300bp 400bp 500bp 600bp 700bp 800bp 900bp 1000bp 1100bp 1200bp
Gap between adjacent islands 100bp 150bp 200bp 250bp 300bp

(less than 50kb)