Redundancy of myostatin and growth/differentiation factor 11 function

Table 2 Lumbar vertebral number from newborn mice

	Genotype
Mstn	+/+	+/+	+/+	+/-	+/-	+/-	-/-	-/-	-/-
Gdf11	+/+	+/-	-/-	+/+	+/-	-/-	+/+	+/-	-/-
Total number of lumbar vertebrae	Number of animals
5	3	-	-	3	-	-	-	-
5+6	1	-	-	-	-	-	-	-
6	6	10	-	7	10	-	10	9
6+7	-	-	-	-	-	-	-	-
7	-	-	1	-	-	1	-	1
7+8	-	-	1	-	-	-	-	-
8	-	-	5	-	-	5	-	-
8+9	-	-	2	-	-	-	-	-
9	-	-	1	-	-	3	-	-
9+10	-	-	-	-	-	1	-	-

Numbers of mice displaying a given number of vertebrae are shown. Some mice have left-right asymmetry of the most posterior lumbar vertebra with a lumbar phenotype on one side and a sacral phenotype the other. These are designated by a + sign between 2 numbers indicating the number of vertebrae possessing a lumbar appearance for each side. Asymmetric vertebrae with a thoracic and lumbar phenotype were counted as thoracic (Table 1). Number of lumbar vertebrae could not be determined for Mstn^-/- Gdf11^-/- mice.

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