ChEBI: D-ribulose 1,5-bisphosphate is a ribulose phosphate that is D-ribulose attached to phosphate groups at positions 1 and 5. It is an intermediate in photosynthesis. It has a role as an Escherichia coli metabolite and a plant metabolite. It is functionally related to a D-ribulose. It is a conjugate acid of a D-ribulose 1,5-bisphosphate(4-).