CXCL12 used “Exon 5′’ to a greater extent in tumor samples, whereas CXCL12 only containing exons 1–3 was expressed much lowly in normal samples (Figures 9B,C), which means that CXCL12 AT Exon 5 could increase the expression of NP_001029058.1. The gene discussed is CXCL12; the disease is neoplasm.