A diagram showing ExPAT’s utilities for several user types and a wide array of capabilities. (A) The UI (user interface) web application provides several functionalities via the immunogenic TCE model: (B) reversible expression and TCE donor sorting, (C) matching information (HapLogic grades and vector directionality), (D) allele expansion, (E) tooltips, (F) HLA typing autocompletion, and (G) real-time calculations.