Sequence-tagged sites (STSs) are short stretches of DNA sequence, usually a few hundred bases long, which can be amplified by the polymerase chain reaction, and are regarded as landmarks in a genome. Presence of a specific STS in a genomic clone or DNA...

A sequence-tagged site (or STS) is a short (200 to 500 base pair) DNA sequence that occurs but once in a genome and whose location and base sequence are known. STSs can be detected by the polymerase chain reaction (PCR), and are useful for localizing...