I think I found myself the answer ... but I would apprecaite your confirmation. I guess the identifier "NM_xxxx", called Gene_Bank_Accession_Number by miRDB community, can be retrieved from BioMart using the filter "refseq_dna". Am I right ? Thank you for your patience, Maura -----Messaggio originale----- Da: bioconductor-bounces@stat.math.ethz.ch per conto di mauede@alice.it Inviato: lun 27/07/2009 13.40 A: Bioconductor List Oggetto: [BioC] Gene_Bank_Access_Number Please, do you know whether there exists any mart attributes, for homo sapiens dataset, that corresponds to what is recorded on miRDB and called Gene_Bank_Access_Number ? For example, many such records can be found in file "MirTarget2_v3.0_prediction_result.txt.gz" downloadable from miRDB (http://mirdb.org/miRDB/download.html) In the following I have pasted some records. I am interested in the "NM_xxxxxx" identifier hsa-let-7a NM_024639 52.7097 hsa-let-7a NM_001017989 58.7888648495 hsa-let-7a NM_203331 67.1661111958 hsa-let-7a NM_001879 69.228165244 hsa-let-7a NM_000090 60.4178 hsa-let-7a NM_018273 75.9952 hsa-let-7a NM_001127226 67.1661111958 Thank you very much in advance, Maura tutti i telefonini TIM! [[alternative HTML version deleted]] _______________________________________________ Bioconductor mailing list Bioconductor@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/bioconductor Search the archives: http://news.gmane.org/gmane.science.biology.informatics.conductor tutti i telefonini TIM! [[alternative HTML version deleted]]