(a) Two sets of biologic replicates, each composed of cells that had been isolated CD-1 neonatal mouse calvarium by collagenase-digestion and EDTA treatment (6 calvaria/sample), were collected. An aliquot from each sample was immediately subjected to single cell RNA-seq; the remaining cells were plated, allowed to reach confluence, and cultured under osteogenic conditions for 12 days prior to undergoing single cell RNA-seq. (b) 12-week-old C57Bl/6J male mice received 2 SclAbIII (n=4) or 2 PBS (n=4) injections, 3 days apart. Four days later, tibial and femoral diaphyses were collected from each mouse and the endocortical cells were recovered by collagenase digestion.