iss049e040145 (10/19/2016) --- NASA astronaut Kate Rubins working with WetLab-2 Ribonucleic Acid (RNA) SmartCycler tubes for Session 3. Wetlab RNA SmartCycler is a research platform for conducting real-time quantitative gene expression analysis aboard the International Space Station (ISS). The system enables spaceflight genomic studies involving a wide variety of biospecimen types in the unique microgravity environment of space.