YNL256W FOL1 SGDID:S000005200, Chr XIV from 164623-167097, Genome Release 64-1-1, Verified ORF, "Multifunctional enzyme of the folic acid biosynthesis pathway, has dihydropteroate synthetase, dihydro-6-hydroxymethylpterin pyrophosphokinase, and dihydroneopterin aldolase activities"