Fig. 8

Morphometric analysis of mineralised bone. (A, B) Alizarin red staining of vertebrae 36 dpf zebrafish of the indicated genotypes. (C) Quantification of the neural spine:hemal spine/rib length ratios for vertebrae 5–28. Data-points for individual animals are indicated by different colours. Mean ± standard deviation of values of these ratios averaged across all ribs for each animal, indicated by the brackets, and subsequently averaged over three animals are 0.401 ± 0.024, 0.423 ± 0.029 and 0.335 ± 0.005 for wild-type, heterozygous and homozygous mutant animals, respectively (n = 3 animals). P-values compared to wild-type are indicated. This represents a statistically significant difference in homozygotes versus each of the other two genotypes (t-test). Tail lengths taking into account spinal curvature were 12.694, 12.872 and 12.749 mm for the representative wild-type, ppp2r3b+/− and ppp2r3b−/− animals shown, respectively. All animals are generation F4. Scale bars are 5 mm in (A); 2 mm in (B).