The National Institute of Allergy and Infectious Diseases (NIAID) sponsored Pathogen Functional Genomics Resource Center (PFGRC) at TIGR is pleased to announce the addition of a Mycobacterium tuberculosis strains H37Rv and CDC1551 Invitrogen Gateway® Entry Clone Set to the PFGRC Gateway® Entry Clone Resource. The M. tuberculosis PCR products were prepared under the NIAID contract "TB Vaccine Testing and Research Materials" at Colorado State University, and subsequently cloned and sequence validated by the PFGRC. The resulting entry clone collection consists of 2612 ORFs from strain H37Rv and is supplemented with 243 unique ORFs from strain CDC1551. The validated ORFs were constructed in the pDONR221 Invitrogen Gateway® Entry Clone Vector with modified att sites. Each ORF has an introduced universal ATG site. The PFGRC is making this resource available to the research community free of charge as a complete clone set or individual entry clones. Please follow the link to the PFGRC Invitrogen Gateway® Entry Clone Resource for detailed ordering instructions for the complete clone set or individual clones.