Expedition 57 Flight Engineer Serena Auñón-Chancellor is pictured mixing protein crystal samples

iss057e074529 (Nov. 9, 2018) --- Expedition 57 Flight Engineer Serena Auñón-Chancellor is pictured mixing protein crystal samples to help scientists understand how they work. Proteins crystallized in microgravity are often higher in quality than those grown on Earth and present opportunities for the development of new drugs to treat disease.