The following information accompanied stocks donated to the Bloomington Stock Center by Peter Gallant, University of Würzburg. M{UAS-Myc.HA.DeltaC} expresses HA-tagged Myc protein lacking the entire C-terminus (basic region, helix-loop-helix and leucine zipper) under UAS control. It expresses amino acids 1 through 625. Its construction was similar to other UAS-Myc.HA constructs described in Schwinkendorf and Gallant (2009; FBrf0207648). The expressed protein cannot bind Max. Expression under the control of actin5C-GAL4 reduces the viability of otherwise wild type flies by 50%. M{UAS-Myc.HA.DeltaC}ZH-86Fb is an insertion into the M{3xP3-RFP.attP}ZH-86Fb attP target site at 86F8, 3R:11808359 (release 6).