cardiac beta-adrenergic receptors as assessed in crude membrane fractions by the binding of ( - ) ( 3h ) dihydroalprenolol did not differ significantly in either number or affinity in conditioned hearts ( 30 +/- 2 fmol.mg-1 protein ; kd = 1.4 +/- 0.1 nmol.litre-1 ) compared with sedentary hearts ( 33 +/- 2 fmol.mg-1 ; kd = 1.5 +/- 2 nmol.litre-1 ) .
C0018799
conditioned hearts
C0018787
hearts