to elucidate the developmental changes of atrial natriuretic polypeptide in the human heart , we studied alpha-human atrial natriuretic polypeptide ( alpha-hanp ) -like immunoreactivity ( alpha-hanp-li ) in the extracts from the hearts of three foetuses of 10 , 14 and 22 weeks ' gestation , a 1-day-old premature infant of 33 weeks ' gestation , and two adults , alpha-hanp-li levels in the atria of the three foetuses of 10 , 14 and 22 weeks ' gestation and the premature infant ( 31.4 , 12.2 , 9.25 and 15.3 nmol/g , respectively ) were comparable to those in two adult atria ( 16.9 and 13.6 nmol/g ) .
C0018787
hearts
C0018792
atria