Genes in Space 5 (IMAGE) NASA/Johnson Space Center Caption NASA astronaut Ricky Arnold prepares the miniPCR for Genes in Space-5, a student designed investigation studying alterations in DNA that may lead to weakened immunity. Credit NASA 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.