Summary of changes observed in the expression of genes involved in the regulation of glycogen storage in G+ and G- chickens and putative interactions between them. Genes highlighted in red and green were up- and down-regulated in G+ compared to G- muscle, respectively. Genes in white boxes were not differentially expressed between G+ and G- muscles. Gene names are indicated in capitals: PHKA, PHKB, PHKG, PHKD, Phosphorylase kinase, alpha, beta, gamma, delta subunit, respectively; PRKAA, PRKAB, PRKAG, AMP-activated protein kinase, alpha, beta, gamma subunit, respectively; PKA, Protein kinase A; GYS, Glycogen synthase; PYG, Glycogen phosphorylase. See Table 3 for other gene names.