However,this sox9bb971mutant is not the adequate tool to address thespecific function of sox9b as (i) this allele contains a large deletionremoving sox9b but also sox8 and pvalb1, 4, 8 (Yokoi et al., 2009)and (ii) the global morphology of sox9bb971mutants was alteredand many organs were hypoplasic such as the pancreas and liver,but also the intestine and swim bladder which both do notexpress sox9b