PAX7 and rhabdomyosarcoma: Wealso selected genes whose expression changes during neural celldifferentiation: the RBFOX3 gene encoding the NeuN protein[26, 27]and the TUBB3 gene encoding β3-tubulin [27].Because TE-671 rhabdomyosarcoma cells are known to becapable of differentiating into muscle cells, we chose the myogenin gene MYOGand the transcription factor gene PAX7 to analyze the differentiation of thesecells [28].