The National Institute of Neurological Disorders and Stroke (NINDS) and the National Institute of Mental Health (NIMH) invite applications for support of Microarray Centers. These Centers will support gene expression profiling in the nervous system through the application of microarray technologies. The Microarray Centers, which will function as a consortium, will provide reagents, services, and training to the neuroscience community, on a fee-for-service basis. The term “consortium” is used here to refer to the Centers that are funded through this RFA, and not to refer to non-grantee, participating organizations.