Long-lived chondroprogenitors are generated by Gli1+ fetal cells and are replenished upon mosaic cell-cycle arrest in the cartilage.

Single-nuclei RNA sequencing of cells dissociated from Hindlimb (femur and tibia as well as surrounding tissue) from E16.5 embryos to identify how catch-up growth happens during injury and to show transcriptional identities of contributors in p21-overexpression induced injury in unilateral models.