Abstract
The Mouse Tumor Biology Database (MTB) is a Web-based resource that provides access to information on tumor frequency and latency, genetics and pathology in genetically defined mice (transgenics, targeted mutations and inbred strains). MTB is designed to serve as an information resource for cancer genetics researchers who use the laboratory mouse as a model system for understanding human disease processes. Data in MTB are obtained from the primary scientific literature and direct submissions by the research community. MTB is accessible from the Mouse Genome Informatics Web site (http://www. informatics.jax.org). User support is available for MTB via Email at mgi-help@informatics.jax.org