Hemorphin-7 binds to the angiotensin IV receptor, triggering multiple effects including cellular proliferation and memory enhancement. Hemorphins are endogenous peptides belonging to the family of atypical opioid peptides released from hydrolyzed hemoglobin. Hemorphin-7 is investigated as a potential biomarker for breast cancer.

Leuphasyl TFA is an amid peptide, a δ-opioid receptor agonist, is a degradation resistant long-acting Leu-enkephalin analog used to study the signaling pathway of delta opioid receptors.?

CP-866087 is a novel, potent and selective mu-opioid receptor antagonist for the study of female sexual dysfunction.