Schematic representation of the spectrum of KAT6B variants identified in this study. All coding exons are shown in purple. Arrows point to the exonic location of the variants identified. Key: frameshift variants, in-frame deletion, missense variant, synonymous variant, nonsense variants. Variants identified in other studies are in italics. The protein structure shows the protein domains. NEMM: highly conserved N-terminal domain with a role in transcriptional repression. PHD: zinc finger domain, MYST: responsible for histone acetyltransferase activity.