The IU GTTL provides services to domestic and international academic and commercial institutions. Please contact us to learn more about any of the services described in this website. The IU GTTL also houses the National Gene Vector Biorepository (NGVB). The NGVB is an NIH-funded resource that offers free services to eligible investigators. Services include certification testing, pharmacology and toxicology archiving services, and the ability to order reagents from the repository.