Gallery Scientific GFAP isoform in GBM Image 1 of 14 Glial Fibrially Acidic Protein (GFAP) isoforms in Glioblastoma Multiforme (GBM) tumor tissue section. Immunostained for GFAPalpha (Green) and delta (red), counterstained with Hoechst (DAPI, blue) Lab Life Notes on a plate cover Image 3 of 8