We quantified levels of transcription factors Sp1 and Sp3 in the astrocytoma and GBM samples, relative to control brain tissue, and these are shown in Figure 5A and 5B, with tissue sample arranged as in Figure 3, so the GBM's with the lowest level of MAOB are on the left and highest levels on the far right. Here, SP3 is linked to glioblastoma.