MACROMOLECULAR PROPERTIES OF POLY(ADP-RIBOSE) AND THE REGULATION OF ITS BIOSYNTHESIS AND DEGRADATION IN PERMEABILIZED RAT BRAIN 9L-GLIOSARCOMA CELLS11Ernest Kun is a recipient of a Research Career Award of the United States Public Health Service. The original research reported here was supported by the United States Air Force Office of Scientific Research (F-49620-81-C-0007), the United States Public Health Service (HL-27317, CA-13525), the American Cancer Society (RD-137), the Swedish National Science Research Council (R-RA-4685-100), and the Swedish Medical Research Council (B-81-04R-6065-504106065).