CgiHunter Version 1.01
The provably exhaustive CpG island annotation tool
Choose your parameters and enter your email address. The results of the analysis will be send to you via email.
Please note that due to technical issues the online service only annotates sequences of a length up to 1.5 megabases.
For sequences of greater length, we recommend to download the software for local usage.
Parameter explanation
Obs/Exp CpG frequency |
The threshold for the ratio of the observed over the expected frequency of CpG dinucleotides that a region must exceed to be accepted.
Choose a value from the range 0.5 to 2.0. |
GC content |
The minimal GC content of CpG islands.
Choose a value from the range 0.5 to 1.0. |
Minimal Length |
The minimal length of a CpG island.
Choose a value greater than 100. |
Sequence |
Sequences are assumed to be in Fasta format. Only the symboles A,C,G,T,a,c,g,t are recognized as DNA bases. All other symbols will be interpreted as masked repeats.
Insert only one sequence at a time to guarantee correct annotation of the start positions. |
Format |
Cgi map annotation: For overlapping regions that met the constraints only the region with the highest score will be annotated as CpG island.
Cgi shadow annotation: All overlapping regions that fulfill the constraints are projected on the DNA sequence and merged into one region. |
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