Description: This mouse model harbors a transgene that deletes 2.7kb of intron 23 in the Ift88 gene resulting in a null allele. Heterozygous mice are phenotypically normal. Homozygous mice in the C57Bl/6 background develop multiple embryonic defects including preaxial polydactyly, hydrocephalus and cystic kidneys and can survive 2-4 months of age.

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