PTC Therapeutics is a biopharmaceutical company that focuses on the development and commercialization of orally administered, small molecule drugs that target post-transcriptional control processes. The company's lead product candidate is Translarna (ataluren), which is for the treatment of of nonsense mutation Duchenne muscular dystrophy in ambulatory patients. It is currently in Phase III clinical trials to treat cystic fibrosis caused by nonsense mutations. The company was founded in 1998 and is headquartered in South Plainfield, New Jersey.