Answers to treating muscular dystrophies could lie in better understanding muscle repair — which resembles a delicate cellular dance choreographed by special cells called fibro-adipogenic progenitors (FAPs). Now, scientists at Sanford Burnham Prebys Medical Discovery Institute (SBP) have revealed that FAPs don't have just one identity–but several distinct identities that emerge during key stages of muscle regeneration. These cells they could be targeted for drug development. The study was published in Nature Communications.