Appetite Accomplice: Ghrelin Receptor Alters Dopamine Signaling (IMAGE) Cell Press Caption GHSR1a allosterically modifies DRD2 signaling via a heteromer. Credit Roy G. Smith, The Scripps Research Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.