QIAGEN has released Version 3.0 Array-Ready Oligo Sets (AROS) for the Human and Mouse Genomes. Human AROS V3.0 contains 34,580 70 mer probes, representing 24,650 genes and 37,123 gene transcripts. Mouse AROS V3.0 contains 31,769 70 mer probes, representing 24,878 genes and 32,829 gene transcripts. AROS Version 3.0 design is based on Ensembl, a public, open-source database and genome browser (http://www.ensembl.org/). Probe design allows detection of alternative splicing variants using common, partial common, or individual transcript oligos. Human and Mouse AROS come with complete annotation provided by the QIAGEN Oligo Microarray Database and Ensembl. The Human and Mouse AROS provide a library of ready-to-print oligos with the flexibility to spot oligos and detect signals using various printing and hybridization techniques. Each probe is melting-temperature normalized and includes a 5' amino linker to facilitate substrate attachment. Each AROS is provided in 384-well plate format with 600 pmol of product per well. A control plate with 24 controls in 16 replicates is also included. AROS sample sets, which include 96 optimized 70mers in 384-well plate format at 600 pmol, are also available.