Fig. 3. RT-PCR analysis of glycogen synthase (GS) gene expression in the brain (B),
gills (G), liver (L), muscle (M), intestines (I), heart (H), spleen (S) and
kidneys (K) of tilapia. ß-Actin was used as an internal control. GS was
expressed in all of the tissues examined, with the brain, muscle, heart and
spleen showing higher expression levels.