One postdoctoral position is available in the laboratory of Dr. K. Hayakawa at Fox Chase Cancer Center in Philadelphia. The laboratory specializes in natural autoreactive B cell development, growth regulation, and transformation (leukemia). Applicants must have Ph.D./M.D. with substantial research experience, preferably in immunology and molecular biology. The role of self-antigen in generation of chronic B cell leukemia, potential cancer stem cells, and mechanism(s) of growth dysregulation will be explored. Candidate must be hard-working and highly motivated. Send curriculum vitae, summary of research experience, and names of at least three references to: K_Hayakawa@fccc.edu