Please separate carefully at the perforation and return just this portion in the envelope provided. ![LOGO](https://capedge.com/proxy/S-4A/0001193125-20-288030/g29194g56z83.jpg)
![LOGO](https://capedge.com/proxy/S-4A/0001193125-20-288030/g29194g48k66.jpg)
Proxy for Proteostasis Therapeutics, Inc. Special Meeting of Stockholders to be held on Wednesday December 16, 2020
This proxy is being solicited on behalf of the Board of Directors
Please vote, date and sign this Proxy on the other side and return it in the enclosed envelope.
The Stockholder signing on the reverse side (the “undersigned”), having received the Proxy Statement, hereby appoint(s) Meenu Chhabra and Janet L. Smart and each of them, Proxies of the undersigned (with full power of substitution) to attend the Special Meeting of Proteostasis Therapeutics, Inc. (the “Company”) to be held on Wednesday December 16, 2020, and all adjournments and postponements thereof (the “Meeting”), and to vote all shares of Common Stock of the Company that the undersigned would be entitled to vote, if personally present, in regard to all matters that may properly come before the Meeting.
The undersigned hereby confer(s) upon the Proxies, and each of them, discretionary authority to consider and act upon such business, matters or proposals as may properly come before the Meeting. The Proxy, when properly executed, will be voted in the manner specified herein. If no specification is made, the Proxies will vote all shares represented by this Proxy FOR all Proposals.