Expression of X-linked genes in cell lines. Samples are as follows: 1: DO208915 (female B-cell line), 2: GM08714 (female ICF B-cell line), 3: SHYSY5Y (female neuroblastoma cell line), 4: differentiated SHYSY5Y, 5: female brain control, 6: negative control. Molecular weight marker is HyperLadderV (bioline). Expression of control genes can be observed in all samples and all products are appropriate size. Expression of PCDH11 is observed only in female brain control sample.