The Synthetic Receptor Preferentially Binds a Male Hormone (image) Tokyo Institute of Technology Share Print E-Mail Caption A schematic representation of the selective binding of testosterone from a mixture of testosterone, progesterone, and beta-estradiol in water. The receptor has an inner cavity with a diameter of approximately one nanometer. Credit Science Advances Usage Restrictions None Share Print E-Mail 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.