Zika virus is a mosquito-borne infectious disease linked to certain birth defects in infants in South and Central America and the United States. A Lawrence Berkeley National Laboratory (Berkeley Lab) researcher, Banumathi Sankaran, worked as part of a multi-institutional team to map a key viral protein called NS5. Necessary to virus reproduction, NS5 contains two enzyme activities: one reduces the body’s ability to mount an immune response against infection and the other helps start the genetic replication process. The work was led by Indiana University’s Cheng Kao and Pingwei Li at Texas A&M University (TAMU).