anp concentrations ( means +/- 1 sd ) in ng/mg protein and ng/animal were 1296 +/- 505 and 7707 +/- 1877 in adult atria ( n = 17 ) , 174 +/- 44 and 62 +/- 13 in 20-day fetal atria ( n = 7 ) , and 33 +/- 5.3 and 3.7 +/- 0.9 in 14-day fetal hearts ( n = 6 ) , respectively .
C0015965
fetal
C0015935
fetal hearts