We were unable to detect the endogenous ZNF804A protein in brain (wild-type and Zfp804a mutant mice) or SH-SY5Y neuroblastoma cells (see later) using either commercially available antibodies or antisera developed “in-house.” However, ZNF804A was detected in transfected cells following proteasome inhibition with lactacystin (supplementary figure S1A). Here, ZNF804A is linked to neuroblastoma.