Immunogen sequence: MNAARTGYRV FSANSTAACT ELAKRITERL GAELGKSVVY QETNGETRVE IKESVRGQDI FIIQTIPRDV NTAVMELLIM A; Positive Samples: HeLa, Mouse heart. Seems to play a negative regulatory role in 5-phosphoribose 1-diphosphate synthesis. Target protein binds