Network in which several genes identified as differential between Fat (F) and Lean (L) and/or G+ and G- muscles are involved. The biological interpretation of expression data was performed using Ingenuity Pathway Analysis 7.0 (IPA, Ingenuity Systems Inc., Redwood City, CA). The genes included in the analyses were shown to be differential between F and L and/or G+ and G-. This gene network is involved in several molecular and cellular functions including lipid and carbohydrate metabolism, molecular transport, small molecule biochemistry, and cell morphology. The differential genes surrounded by a dashed line originated from the comparison between F and L birds, and those surrounded by an unbroken line from the comparison between G+ and G- muscles originating from the F2 cross between the F and L lines. The genes over-expressed in muscles with high (F or G+) and low glycogen content (L or G-) are circled in red and green, respectively.