Interaction network leading to cell fusion during myogenesis. The network was constructed according to the literature and based on twelve variant genes. Genes are in bold (+: up-regulated or -: down-regulated). The thickness of the lines is proportional to the expression levels of genes during myogenesis. Blue arrows show the pathways checked by functional experiments. Myogenic steps are in purple rectangles and boxed in red when cells are engaged in this step and in white for later steps.