The files ending with 11 and 16 are frequencies of 11-mers and 16-mers in given genome. The frequencies are stored in species-specific k-mer list files. Files are created with glistmaker from GenomeTester4 package using frequency cut-off (-c) 2. Users can build their own k-mer lists for species of interest. GenomeTester4 software for making properly formatted k-mer lists can be downloaded from GitHub.
Please contact Maido Remm if you have any comments of the current Primer3 k-mer lists or wish to request lists for other species.