A 3140 base pair fragment from the flanking non-coding or intronic region of btn is fused upstream of a Drosophila core synthetic promoter (DSCP) that is followed by sequence encoding a GAL4 driver.
ScerGAL4GMR86E01 drives expression in adult astrocyte-like glia; expression is mosaic in the lamina. ScerGAL4GMR86E01 also drives expression in astrocyte-like glia in the larval CNS.