opine metabolism mannopine biosynthesis UPa:UPA00736 N-1-(D-mannityl)-L-glutamine biosynthesis Biosynthesis of mannopine (N-1-(D-mannityl)-L-glutamine), the head member of the mannityl family of opines. Mannopine is found in crown gall tumors. PMID:1852015 pathway PMID:11386375