Each unigene build series has 3 files:

<name>.seq - FASTA file containing the unigene consensus sequence
<name>.qual - FASTA file containing the composite "base quality"
              scores derived from the phred scores of the ESTs that were
	      aligned
<name>-membership.tdv - Tab delimited file indicating which SGN ESTs
(by SGN-E#) are "contained" in which SGN unigenes (SGN-U#). Columns
are defined as follows:

SGN-U#       SGN-E#       start    stop     qstart      qend    direction

SGN-U# and SGN-E# are SGN identifiers for the unigene and est
respectively.

start & stop are the starting and ending (respectively) base positions 
relative to the consensus sequence. If these are different from qstart
and qend, the difference between qstart and start, as well as qend and
end, indicates that the leading and/or trailing portion of the EST is
not aligned with the consensus sequence and did not influence the
consensus bases.

qstart & qend are the "quality" starting and ending positions. This
means that the EST is aligned with the consensus sequence over the
indicated region and the EST bases influenced the consensus bases.

direction inidicates whether the given EST sequence was assembled ("+"), or
its reverse complement sequence ("-"). By "given sequence" we simply
mean that found when reading the chromatogram, or the direction given
by SGN's database if queried with the SGN-E# for the EST in question.

The directory also contains a file with a conversion table from tigr tc # to sgn unigene #.