This track shows the number of 25-mers in the genome that are the same as the 25-mer centered at the current position with up to two mismatches allowed. The current position is included. This track is empty over areas masked by RepeatMasker or trf at period 12 or less. It is best to design microarray probes and PCR primers where the count in this track is only one to avoid cross-hybridization.
For best results view this track with Interpolation set to Only Samples.