The OneArray® microRNA expression-profiling microarrays have been updated based on the latest miRBase release (version 17). This miRBase release features an increase over the previous version in the number of microRNA sequences, with 2,406 additional mature microRNA, of which 563 represent newly verified sequences in human, mouse, and rats. The OneArray microRNA line includes human, mouse, rat, and seven major plant species: rice, corn, soybean, grapevine, Sorghum, Arabidopsis, and Brachypodium.