(A) Spot titer assay using B. subtilis strains WT (PY79), ΔddcA (PEB357), ΔddcA amyE∷Pxyl-ddcP (PEB836), and ΔddcA amyE∷Pxyl-ctpA (PEB837) spotted on the indicated media. (B) Spot titer assay using B. subtilis strains WT (PY79), ΔddcP ΔctpA (PEB555), ΔddcP, ΔctpA, amyE∷Pxyl-ddcA (PEB838), ΔddcP, ΔctpA, amyE∷Pxyl-ddcP (PEB557), ΔddcA ΔddcP ΔctpA (PEB639), ΔddcP, ΔctpA, ΔddcA, amyE∷Pxyl-ddcA (PEB840), ΔddcP, ΔctpA, ΔddcA, amyE∷Pxyl-ddcP (PEB839), and ΔddcP, ΔctpA, ΔddcA, amyE∷Pxyl-ctpA (PEB841) spotted on the indicated media. (C) Spot titer assay using B. subtilis strains WT (PY79), ΔddcP ΔctpA (PEB555), ΔddcP, ΔctpA, amyE∷Pxyl-ddcA (PEB838), ΔddcA ΔddcP ΔctpA (PEB639), ΔddcP, ΔctpA, and ΔddcA, amyE∷Pxyl-ddcA (PEB840) spotted on the indicated media.