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Fig. 6. Diagrammatic summary of Gli function. Frog proteins are in lower case
whereas human proteins are in upper case. Green and red indicate activator or
repressor activity. Arrows indicate induction and T bars repression. Thick
lines refer to changes of fivefold or higher. The numbers next to the arrows
or T bars indicate the requirement of the different endogenous Gli genes. The
data derive from Table 1.