A variety of GFAP proteins with different molecular weights are described in a second 2‐DE gel electrophoresis study that compares astrocytoma to healthy brain tissue, and the results show a higher expression of a 49 kDa GFAP protein and proteins ranging from 36 to 49 kDa in astrocytoma (Narayan et al., 1986). The gene discussed is GFAP; the disease is astrocytoma (excluding glioblastoma).