Fei Chen, PhD, is an assistant professor at the Harvard Department of Stem Cell and Regenerative Biology, and a Core Faculty member at the Broad Institute. Learn more about Fei and his research. RNA is the message cells use to execute their functions. If we think of the cell as a computer, RNA is the code that the cell uses to perform its activities. By sequencing RNA, we can understand what different cell types are doing. This approach allows us to discover cell types and states in an unbiased way and understand how they interact and communicate during development in the context of their physical location. Additionally, we are interested in programming and manipulating cells to create new tissues or deliver cells into existing tissues.