Hello Goel, On Friday, Apr 1, 2005, at 10:36 US/Central, Goel, Manisha wrote: > I need to parse the blast ouput to get the taxonomy information. > If I could get the taxonomy nodes associted with each gi number .. This > would also work. If I understand you correctly, you want to display the taxonomy lineage given a gi that you've parsed out of a BLAST report. Is that right? For example, let's say one of your blast queries hit gi 1392161. Since this is for a human cDNA clone, its associated taxid would be 9606 and therefore its taxonomy lineage would be this: +--------+------------------------+ | tax_id | name_txt | +--------+------------------------+ | 1 | root | | 131567 | cellular organisms | | 2759 | Eukaryota | | 33154 | Fungi/Metazoa group | | 33208 | Metazoa | | 6072 | Eumetazoa | | 33213 | Bilateria | | 33316 | Coelomata | | 33511 | Deuterostomia | | 7711 | Chordata | | 89593 | Craniata | | 7742 | Vertebrata | | 7776 | Gnathostomata | | 117570 | Teleostomi | | 117571 | Euteleostomi | | 8287 | Sarcopterygii | | 32523 | Tetrapoda | | 32524 | Amniota | | 40674 | Mammalia | | 32525 | Theria | | 9347 | Eutheria | | 9443 | Primates | | 9526 | Catarrhini | | 9604 | Hominidae | | 207598 | Homo/Pan/Gorilla group | | 9605 | Homo | | 9606 | Homo sapiens | +--------+------------------------+ Is that what you are looking for? Regards, - Robert