All communications hereunder will be in writing and effective only on receipt, and, if sent to the Manager, will be mailed, delivered or telefaxed to the Citigroup Global Markets Inc. General Counsel (fax no.: (646) 291-1469) and confirmed to the General Counsel, Citigroup Global Markets Inc., at 388 Greenwich Street, New York, New York, 10013, Attention: General Counsel; or, if sent to the Company, will be mailed or delivered to it at Tocagen Inc., 4242 Campus Point Court, Suite 500, San Diego, California, 92121 attention of the Legal Department, with a copy sent via email to Karen Deschaine Anderson, Cooley LLP, at kanderson@cooley.com.