We are pleased to host the ninth Cold Spring Harbor meeting on The Ubiquitin Family, which will will begin at 7:30 pm on Tuesday, April 18 and run through lunch on Saturday, April 22, 2017. The meeting will cover current work on the structure, regulation and function of ubiquitin and ubiquitin-like proteins in biology. The meeting is intended to provide a format for the exchange of ideas and information, to discuss the latest research findings and technical advances, and to facilitate interaction amongst groups active in diverse systems.