cyclic amp ( 10 ( -3 ) m ) , dibutyryl cyclic amp ( 1.2 x 10 ( -4 ) m or 1.2 x 10 ( -3 ) m ) and theophylline ( 10 ( -2 ) or 10 ( -3 ) m ) caused similar hyperpolarization : d- and dl-propranolol ( 5 x 10 ( -5 ) -5 x 10 ( -4 ) m ) produced depolarization and inhibited hyperpolarization by thyrotropin .
C0001455
cyclic amp
C0012054
dibutyryl cyclic amp