To gain a mechanistic understanding of the role of IQGAP1 in glioblastoma and how might Haldol affect IQGAP1 pathways, we performed mass spectrometry on immunoprecipitate (IP) complexes obtained by IQGAP1-specific antibodies from Haldol-treated and untreated U87 and LN18 GBM cell lysates (see Materials and Methods). Here, IQGAP1 is linked to glioblastoma.