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Other mutants used were the amorphic zw3, the partial loss-of-function arm (mutation leads to Arginine 394 being mutated to a Histidine) that reduces Arm's affinity toward TCF, and the strong hypomorph arm that contains a stop codon at the end of repeat twelve (stop codon introduced after amino acid 680), deleting the entire C-terminal region preventing Wg signaling [24].
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