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Table 1 X-ray analyses of the axial skeleton of 18 adult mice without an external phenotype from Tg(msd/Dll1)Ieg lines.

From: Compartmentalised expression of Delta-like 1 in epithelial somites is required for the formation of intervertebral joints

number of vertebrae vertebral fusions reduced vertebrae
cv th lu sa ta cv th lu sa ta cv th lu sa ta
7 13 6 4 >25 - - 5–6 - - - - - - 2–4
7 12 7 4 >25 - - 3–6 4+ +1–4 - 11–12 - - -
7 13 6 4 >25 - - - - - - - - - 2–3
7 13 6 4 >25 - - - - - - - - - -
7 12 7 4 >25 - - - - - - - - - -
7 13 6 4 >25 - 13+ +1; 5–6 - - - - - - -
7 13 6 4 >25 - - - - - - - - - -
7 12 7 5 >25 - - 1–2; 4–5 - - - 11–12 - - -
7 13 6 4 >25 - - - - - - - - - -
7 14 5 4 >25 - - - - - - - - - -
7 13 6 4 >25 - - 3–4 - - - - - - 2–4
7 12 7 4 >25 - - 4–7 - - - 10–12 - - -
7 13 6 4 >25 - - 2–4 - - - - - - -
7 13 6 4 >25 - - - 4+ +1 - - - - -
7 13 6 4 >25 - - - - - - - - - -
7 13 6 4 >25 - - - - - - 11–14 - - -
7 13 6 4 >25 - - - - - - - - - -
7 12 7 4 >25   12+ +1 4+ +1 - - - - -
7 13 6 4 >25 - - - - - - - - - -
  1. cv, cervical; lu, lumbar; ta, tail; th, thoracic; sa, sacral
  2. Bold values differ from the wild-type phenotype presented in the bottom row. Numbers with a '+' indicate fusions of vertebral bodies to the next or previous vertebra. "Reduced vertebra" refers to a shortened R/C length of vertebrae.