The United States Department of Commerce National Technical Information Service (NTIS) serves as the largest central resource for government-funded scientific, technical, engineering, and business related information available today. Included are citations for millions of publications in hundreds of subject areas.
NCBI (National Center for Biotechnology Information) is a cross-database search engine for multiple life science databases. Some of the subjects covered include: gene sequences, molecular structure, proteins, and nucleotides.
NextBio alleviates the challenges that are facing the life sciences industry and has developed a suite of products which allow researchers to extract knowledge from disparate biological, clinical, and chemical data, regardless of data type or origin. NextBio's integrated database contains publicly available data from a variety of sources, including GEO, caBIG, and Array Express, among others.