Clontech - pCMV-LacZ: [http://www.google.com/url?sa=t&rct=j&q=pcmv-lacz%20plasmid&source=web&cd=1&ved=0CCoQFjAA&url=http%3A%2F%2Fwww.clontech.com%2Fxxclt_ibcGetAttachment.jsp%3FcItemId%3D17704&ei=CA_cUfeKKsT9ygGy34GQCA&usg=AFQjCNEZFIuddGoULjHW6HXainbDLMbt8Q]