In a very recent study, we documented the identification as well as characterization of a different atypical opioid receptor with exclusive unfavorable regulatory Attributes to opioid peptides.1 Our results confirmed that ACKR3/CXCR7, hitherto generally known as an atypical scavenger receptor for chemokines CXCL12 and CXCL11, can also be a broad-sp