A) Fusion percentages of vehicle and TNAP lentivirus injected Crouzon mice, combining all litters of mice (litters 1–5 for TNAP lentivirus injected, litters 6–9 for vehicle injected). B) Fusion percentages of vehicle injected and only litters 1 and 2 of TNAP lentivirus injected Crouzon mice. CZ = Crouzon vehicle injected, CZ-tx = Crouzon TNAP lentivirus injected, ISS = intersphenoidal synchondrosis, SOS = sphenoccipital synchondrosis, control = vehicle injected.