Homozygous viable. Nonsense and splicing alleles identified by amplicon sequencing. The gk5206 mutation is T->A, flanking sequences GGCCTTTCCAACTTAGAATTTTGGTCGTCC and GAAAAATAACGAAGTTATGGTGAACTCCCT. The gk5207 mutation is C->T, flanking sequences CCTGAGATCAAATGTACAAATTTTCAGGCC and GACGCTACCCGGTAATGATGTACACCCTGA. The gk5208 mutation is T->A, flanking sequences CAATCGTGATGATTCCGACTACTTTCGAGC and GAAATTTGGTGAAACTTTAGGGCTACAATG.