Membrane Receptor (IMAGE) Université de Genève Caption Molecular view of the membrane receptor signaling complex controlling plant organ shedding. The cell surface receptor HAESA (blue) is bound to the hormone IDA (magenta) and the helper protein SERK1 (orange). Credit © Julia Santiago, UNIGE 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.