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Table 1.

Summary of SOX9 sites of expression in the developing chick GI tract

Five days old
Nine days old
GI levelMesodermEndodermMesodermEndoderm
Esophagus − +++ − +++ 
Stomach − − − − 
Pyloric sphincter +++ − +++ − 
Midgut − − +++ 
Caeca +++ ++ +++ 
Hindgut − +++ − ++ 
Five days old
Nine days old
GI levelMesodermEndodermMesodermEndoderm
Esophagus − +++ − +++ 
Stomach − − − − 
Pyloric sphincter +++ − +++ − 
Midgut − − +++ 
Caeca +++ ++ +++ 
Hindgut − +++ − ++ 

−, no detection; +, weak expression; ++, moderate expression; +++,strong expression.

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