Response Genetics Inc. entered into a purchase agreement with certain new and existing investors and certain funds managed by Lansdowne Partners Limited Partnership to raise approximately $4 million from the private placement of 3,005,349 newly issued shares of its common stock, at a purchase price of $1.31 per share. The signing of the purchase agreement occurred on March 5, 2010. The company expectes the final closing of the shares to occur on March 8, 2010.

The securities sold in the private placement have not been registered under the Securities Act of 1933, as amended, or state securities laws and may not be offered or sold in the United States absent registration with the SEC or an applicable exemption from the registration requirements. Response Genetics has agreed to file a registration statement with the SEC covering the resale of the shares of common stock issued in the private placement.