She uses genomics and computational biology approaches to study brain function. She and her group are interested in understanding the underlying molecular basis of Autism Spectrum Disorders and their comorbidity with Intellectual Disability and Sleep Impairments. The lab uses mouse models for functional genomic studies of behavior and patient samples to study genetic contributions to disease. Her latest work was featured as the cover of Science Signaling in January 2018. Moreover, Dr. Peixoto is a former ISCB Student Council leader, having chaired the SCC in 2008 and 2009 and served as SC representative to the board of directors of ISCB in 2009. Currently she is the Junior PI COSI leader as well as the Travel fellowship Committee chair for ISMB2018.