The web interface of dbDEMC. (A) Key word search. miRNAs can be searched via miRNA ID or miRBase accession number. (B) Browse database, users can browse the miRNAs of specific cancers. (C) BLAST. An easy-to-use interface was created for parameter selection. (D) A part of search result page, consisting of a summary, an expression heatmap and the expression status.