Notice: PubMed and Other NCBI Databases Undergoing Maintenance this Weekend

Notice: Upcoming Systems Maintenance NCBI services will undergo maintenance beginning Friday, November 13 at 3:00 PM until Saturday, November 14 at 8:00 PM (EST). During this time retrieval resources such as PubMed and BLAST will be operational but may be intermittently slow. Web and FTP data submission to systems such as GenBank (BankIt), GEO, SRA and PubChem will be unavailable. For questions please write to the Help Desk  at