MuPIT Interactive is an online tool that allows you to map sequence variants from their genomic position onto protein structures. Viewing a variant on protein structure can be useful in interpreting its potential biological consequences. After mapping, the variants are displayed on an interactive 3d structure. The user may turn variants on and off, and display annotations on the protein structure. MuPIT Interactive was a project between the laboratory of Dr. Rachel Karchin at The Johns Hopkins University and In Silico Solutions, LLC. Rick Kim, Oak Bioinformatics’ CEO, was a lead developer of MuPIT Interactive at In Silico Solutions, LLC.