JOHNSON SPACE CENTER (Houston, TX): The Barrios Protein Crystal Growth (Barrios PCG) team achieved a significant milestone on August 17 with the completion of the Barrios PCG experiment, marking the first time that proteins were mixed, incubated, crystalized, and surveyed all aboard the International Space Station using commercial off-the-shelf multiwell plates. The Barrios PCG experiment defined an approach for optimizing protein crystallization conditions on orbit, elimina