Agouti protein
Agouti protein is       normally expressed in hair follicles to regulate pigmentation through antagonism        of the melanocortin-1 receptor, but in-vitro studies have demonstrated that the       hormone also has potent antagonist activity for the melanocortin-4 receptor       (MC4-R).
 @SUBJECT$  is       normally  @PREDICAT$  in  @OBJECT$  to regulate pigmentation through antagonism        of the melanocortin-1 receptor, but in-vitro studies have demonstrated that the       hormone also has potent antagonist activity for the melanocortin-4 receptor       (MC4-R).