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Portable Network Graphic  |  1995-12-08  |  4.9 KB  |  287x151  |  8-bit (40 colors)
   ocr: - receptor protein - - - o - - - - - hormone 0 plasma - - - membrane adenylate - - - 00 eyclase release of - GTP one subunit j protein ATP STP-GDP cyclic AMP exchange effectson.cellfunctions