There have been great advances in the treatment of hepatitis C with the advent of curative therapies, but hepatitis B has proven far more elusive. That’s due to differences in the way the virus replicates and how it creates a reservoir of viral DNA in the cells in the liver. nChroma Bio, the result of a merger between Chroma Medicine and Nvelop Therapeutics, thinks it has an answer. It’s developing a one-and-done epigenetic editing therapy that silences hepatitis B viral transcription. We spoke to nChroma Bio chief development officer Jenny Marlowe and chief scientific officer Melissa Bonner, about its experimental epigenetic editor for hepatitis B, the merger that brought together the two companies, and how it plans to leverage Chroma’s epigenetic editing platform with Nvelop’s programmable non-viral delivery technologies in future therapies.