Fig. 1. Jun is required for axial skeletogenesis. (A) Skeletal phenotype of Bal1;Jun^/ mice. Photograph of an adult Bal1;Jun^/ and Jun^f/f control littermate. Arrowhead indicates scoliosis. (B,C) Alcian Blue/Alizarin Red skeletal preparations of E18.5 Bal1;Jun^/-mutant (C) and Jun^f/f control (B) embryos. Arrow in C indicates fused atlas and axis. (D,E) Dorsal view of Alcian Blue stained E16.5 Bal1;Jun^/-mutant (E) and Jun^f/f control (D) mice. The epidermis and the neural tube were removed to visualise vertebral cartilage. Arrowheads in E indicate fusions of Alcian Blue-positive domains.