The p53 protein is known as the “guardian of the genome.” It plays an essential role in suppressing tumors. Rain Therapeutics is targeting a regulator of p53 that is overexpressed in certain cancer and can inactivate it, allowing certain cancers to grow and progress. We spoke to Avanish Vellanki, chairman and CEO of Rain Therapeutics, about the company’s experimental precision therapy milademetan, how it works, and its potential to treat a range of cancers.