as a first step , to identify a putative site of action , the very potent and stable lhrh agonist ( lhrh-a ) , [ d-ser ( tbu6 ) ] des-gly10-lhrh ethylamide ( buserelin ) , was used as an iodinated ligand to characterize lhrh receptors in a membrane preparation of rat thymus , a key organ of the immune system .
C0023610
lhrh
C0006456
buserelin