Table II.

Tag to gene assignment using TIGR or Unigene EST clusters Virtual tags were extracted from EST clusters by identifying the 10-bp sequence following the MboI site closest to the 3′ end of each cluster. The databases of virtual tags were merged with that of the 15,964 experimental tags found at least twice to determine the no. of unmatched tags.

Database	TIGR	Unigene
Total no. of virtual tags	31,002	24,456
No. of virtual tags matching one single gene	27,740 (89%)	23,201 (95%)
No. of experimental tags with no match in the Database	8,926 (56%)	9,608 (60%)