ChEBI: Fumarate(2-) is a C4-dicarboxylate that is the E-isomer of but-2-enedioate(2-) It has a role as a metabolite, a human metabolite and a Saccharomyces cerevisiae metabolite. It is a butenedioate and a C4-dicarboxylate. It is a conjugate base of a fumarate(1-).