Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13G dated January 2, 2013 (including amendments thereto) with respect to the Common Stock of Pacific Biosciences of California, Inc.  This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Dated:  January 2, 2013	Raging Capital Master Fund, Ltd.
	By:	Raging Capital Management, LLC Investment Manager
	By:		/s/ Frederick C. Wasch
			Name:	Frederick C. Wasch
			Title:	Chief Financial Officer

Raging Capital Management, LLC
By:	/s/ Frederick C. Wasch
	Name:	Frederick C. Wasch
	Title:	Chief Financial Officer

/s/ Frederick C. Wasch

Frederick C. Wasch as attorney-in-fact for William C. Martin