uridylyl-L-threonyl-[protein] + diphosphate => L-threonyl-[protein] + UTP
uridylyl-l-threonyl-[protein] + diphosphate => l-threonyl-[protein] + utp
uridylyl-L-threonyl-[protein] + diphosphate => L-threonyl-[protein] + UTP
uridylyl-l-threonyl-[protein] + diphosphate => l-threonyl-[protein] + utp