Hi there Can any one guide me to annotation database (annotation DBI?)for GENE-CHIP miRNA_2 Array of affymatrix,or another way annotations for this Chip.Also how do I use miRNA 2.0 Array, Annotation Files and miRNA 2.0 Array library files to get annotations .Thanks Attia -- output of sessionInfo(): na -- Sent via the guest posting facility at bioconductor.org.