Thr6-bradykinin: Induces relaxation of rat smooth muscle from tail artery and contraction of that from ileum, urinary bladder and uterus. Binds to both bradykinin receptor B1 (BDKRB1) and B2 (BDKRB2). [Hyp3,Thr6]-bradykinin: May produce in vitro relaxation of rat arterial smooth muscle and constriction of intestinal smooth muscle. May target bradykinin receptors (BDKRB). May produce in vitro relaxation of rat arterial smooth muscle and constriction of intestinal smooth muscle. May target bradykinin receptors (BDKRB). Expressed by the skin glands. [Thr6]-bradykinin. [Hyp3,Thr6]-bradykinin. [Thr6,des-Arg9]-bradykinin. Belongs to the bradykinin-related peptide family.