NASC's activities are coordinated with those of the Arabidopsis Biological Resource Center, (ABRC) based at Ohio State University, USA. This facilitates a unified and efficient service for the research community. The stock centres have a distribution agreement. NASC distributes to Europe and ABRC distributes to North America. Laboratories in other locations may establish their primary affiliation with either centre. All plant affymetrix data in NASCArrays has gone to GEO http://www.ncbi.nlm.nih.gov/projects/geo/ throughout the lifetime of the service (as required by many journals) where it should be accessible to all for the foreseeable future. CEL files from NASCArrays are also available at the Iplant cloud Data Store http://www.iplantcollaborative.org/discover/data-store and are accessible using the DAVIS web interface https://data.iplantcollaborative.org/. From here, the data can be accessed by all Iplant technologies. Please use our Link index to NASCarrays data on iPlant http://affymetrix.arabidopsis.info/link_to_iplant.shtml sorted by experiment number.