Upstate Biotech also has Ab vs. GAL4 DNA-binding domain. Can't vouch for how it works. Regards, Linscott's Directory www.linscottsdirectory.com -- Linscott's Directory of Immunological & Biological Reagents 815 Whitney Way, Petaluma, CA 94954 phone: 707-763-7098 fax: 707-763-8372 URL = http://ourworld.compuserve.com/homepages/LINSCOTTSDIRECTORY