1.

Mean characteristics of β₁-adrenoceptor binding sites in myocardial membranes homogenates from NE treated and control rats

Bmax	Controls	1 hr	4 hrs	8 hrs	24 hrs	48 hrs
Mean	959.67	1194.00	1278.67	1215.00	1089.00	976.00
S.D.	31.660	111.906	178.374	184.724	111.879	30.116
p<		0.025	0.038	0.078	0.126	0.553
Kd	Controls	1 hr	4 hrs	8 hrs	24 hrs	48 hrs
Mean	0.97	5.28	2.60	1.55	1.16	1.47
S.D.	0.454	0.116	0.840	1.076	0.799	0.935
p<		0.0001	0.042	0.438	0.743	0.452

B_max (pmoli/mg membrane protein); Kd (pM); values are the means ± S.D. of three animals. t-test: p < 0.05 was considered significant.