tomato_species_unigenes.global_versionmapping.tab is a tabular file that contains the relations between the different unigene assembly for the transcriptomic sequences in SGN. The mapping was done using the sequences members (SGN-E) of each unigene (SGN-U). This file has the following columns: -f1 library_shortname -f2 SGN est accession (SGN-E) -f3 current preprocessing tag for the mRNA sequence -f4 SGN Unigene Build #4 (2001-04-19), Lycopersicon esculentum#1 -f5 SGN Unigene Build #6 (2002-12-20), Lycopersicon esculentum#2 -f6 SGN Unigene Build #9 (2002-12-20), Lycopersicon Combined#1 -f7 SGN Unigene Build #13 (2003-08-20), Lycopersicon Combined#2 -f8 SGN Unigene Build #18 (2004-06-30), Lycopersicon Combined#3 (SGN accessions for TOM1 and TOM2 ) -f9 SGN Unigene Build #23 (2006-06-27), Tomato200607#1 (tomato_species#1) -f10 SGN Unigene Build #45 (2009-03-11), Tomato200607#2 (tomato_species#2) (CURRENT)