Hundreds of Natural-Selection Studies Could be Wrong, Study Demonstrates (image) Penn State Share Print E-Mail Caption The image depicts the structure of the bovine rhodopsin protein. The blue circles represent amino acid sites that have undergone natural selection as determined through experiments, while the red circles represent amino acid sites that have undergone natural selection as determined through statistical analyses. Credit Masafumi Nozawa, Penn State (Adapted from Yokoyama et al. 2008 PNAS) Usage Restrictions The credit information must be published along with the image. 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.