We isolated endothelin receptor A (ET(A)) from bovine lungs in a singl
e-step purification procedure using antibodies raised against syntheti
c peptides that correspond to extra- and intracellular domains of the
rat bradykinin receptor. Two receptor species of 55 and 35 kDa were is
olated and subjected to N-terminal microsequencing. The difference bet
ween the observed and expected molecular weight species suggests that
bovine ET(A) receptor is glycosylated.