The mapping beetween Affymetrix Tomato Genome Array probes and ITAG2.3 cDNA 
 sequences was performed using bwa and filtered using a simple Linux script 
 to retrieve the mapped sequences.
 
 The probes correspond to the Affymetrix Tomato Genome Array described at GEO 
 as http://www.ncbi.nlm.nih.gov/projects/geo/query/acc.cgi?acc=GPL4741.
 
 There are 5 different files:
  + A-AFFY-87_AffyGeneChipTomatoGenome.singlemapped_probes.txt, 
    list of composite elements (probe clusters) that map uniquely with one
    ITAG2.3 cDNA sequence.

  + A-AFFY-87_AffyGeneChipTomatoGenome.multimapped_probes.txt, 
    list of composite elements (probe clusters) that map with more than one
    ITAG2.3 cDNA sequence.

  + A-AFFY-87_AffyGeneChipTomatoGenome.probes_ITAG2.3cDNA_mapping.txt
    list of probes with its corresponding loci

  + A-AFFY-87_AffyGeneChipTomatoGenome.compositeelements_ITAG2.3cDNA_mapping.txt
    list of composite elements with its corresponding loci.

  + A-AFFY-87_AffyGeneChipTomatoGenome.probes_ITAG2.3genome_mapping.gff3
    probe mapping file in GFF3 format using the S.lycopersicum genome ITAG2.3
    (ITAG2.3_genomic.fasta) as reference.