using two antisera against atriopeptin iii ( ap iii ) which had different characteristics in cross-reactivities with atrial natriuretic peptide ( anp ) analogs , we have measured an immunoreactive anp ( ir-anp ) in the heart extracts of several species . ir-anp in atrial extracts showed both high and low molecular weights .
C0018787
heart
C0018792
atrial