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Fig. 4. Clones of arm*-expressing cells (red) abolish the expression of sine oculis-lacZ (A), Dachshund protein (B) and Eyes absent protein (C) (all shown in green and white in right-hand panel). As observed in axin- mutant clones, the expression of these genes is eliminated in anterior clones (arrows in B and C), but is often ectopically expressed (arrowhead in C) or not eliminated (arrowhead in B) in posterior clones.