SGD_features.tab

This file replaced the previous chromosomal_feature.tab file. This file
is updated weekly (Saturday).
Highlights of the changes include:

1. It contains information on current chromosomal features in SGD,
including information about Dubious ORFs. It also contains the
coordinates of intron, exons, and other subfeatures that are located
within a chromosomal feature.

2. The relationship between subfeatures and the feature in which they
are located is identified by the feature name in column #7 (parent
feature). For example, the parent feature of the intron found in
ACT1/YFL039C will be YFL039C. The parent feature of YFL039C is
chromosome 6.

3. The coordinates of all features are in chromosomal coordinates.

4. Replacement of several feature types to be more consistent with
Genbank files and other model organism databases. ORF is now gene,
exon is now CDS.

Columns within SGD_features.tab:

1.   Primary SGDID (mandatory)
2.   Feature type (mandatory)
3.   Feature qualifier (optional)
4.   Feature name (optional)
5.   Standard gene name (optional)
6.   Alias (optional, multiples separated by |)
7.   Parent feature name (optional)
8.   Secondary SGDID (optional, multiples separated by |)
9.   Chromosome (optional)
10.  Start_coordinate (optional)
11.  Stop_coordinate (optional)
12.  Strand (optional)
13.  Genetic position (optional)
14.  Coordinate version (optional)
15.  Sequence version (optional)
16.  Description (optional)