piRNABank is a web analysis system and resource, which provides comprehensive information on piRNAs in the three widely studied mammals namely Human, Mouse, Rat and one fruit fly, Drosophila. It compiles all the possible clusters of piRNAs and also depicts piRNAs along with the associated genomic elements like genes and repeats on a genome wide map. Search options have been designed to query and obtain useful data from this online resource.

piRNABank provides the following features:

• Simple search
• Search piRNA clusters
• Search homologous piRNAs
• piRNA visualization map