A powerful technique for analyzing DNA and protein sequences,
the sequence logo, is now
available to researchers.
This method has advantages over the conventional method of creating a consensus.
For example, a logo of DNA shows all the bases
found in the binding site of a protein, indicates
how much each base is conserved, and depicts
the location of the conservation with respect
to the major and minor grooves of the DNA.
It is the intent of this paper to explain sequence logos, to
show their usefulness for biological and linguistic research,
and to encourage their use by others.