to further delineate the relationship between gh-releasing factor ( grf ) and somatostatin ( srif ) in generation of the ultradian rhythm of gh secretion , we used two grf peptides , human pancreas ( hp ) grf-44 and rat hypothalamic ( rh ) grf , and studied their interaction with srif by passive immunization with a specific antiserum ( as ) to srif .
C0037668
gh-releasing factor
C0020663
hypothalamic