Biology / Unit 7 Bio 1565 short lesson, about 20 seconds
Sequence-Tagged Sites
Captions available
The idea
A sequence-tagged site is a short DNA sequence with a known, unique chromosomal location, used as a landmark for sequence mapping.
In practice
An expressed sequence tag from a cDNA library and a single sequence length polymorphism from a known marker are both sequence-tagged sites.
Where people slip
A sequence-tagged site is defined by its unique known location, not by any biological function of the sequence itself.
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