It can be specified if the TALEN designs are be tested for any secondary off-target effects. This means if they will cut in any exogenous, foreign introduced sequences.
Check every individual off-target or paste a set of FASTA sequences into the text area
This text area only accepts FASTA format sequences as input e.g.: >some sequence ATATCGATGCTAGCTAGCT GATCGTAGCTAGCTAGCTA