I would appreciate if someone would be kind enough to provide me with the cDNA of CD4. I would like to use it to make chimera. Best wishes, David Yu -- 35-40 Rehab Center, Rheumatology Division, UCLA, Los Angeles, CA90095-167022. Tel: (310)-395-5909, FAX: (310)-206-8606. E-mail: dyu at med1.medsch.ucla.edu or dtyyu at ucla.edu