gene expression Expression of CHOP (DDIT3, GADD153) Expression of CHOP (DDIT3, GADD153) is a subtype of gene expression: The process in which a gene sequence is converted into a mature CHOP (DDIT3, GADD153) gene product or products (proteins or RNA). http://www.reactome.org/PathwayBrowser/#/R-HSA-380994&SEL=R-HSA-1791107&PATH=R-HSA-392499,R-HSA-381119,R-HSA-381042