Up: ``Sequence'' Input Tags
format: TARGET (interval list, default empty)
If one or more Targets is specified then a legal primer pair must flank at least one of them. A Target might be a simple sequence repeat (microsatellite) site (for example a CA repeat) or a single-base-pair polymorphism. The value should be a space-separated list of:
pairs where start is the index of the first base of a Target, and length is its length.
For backward compatibility Primer3 accepts (but ignores) a trailing description for each element of this argument.