RNA(n) + UTP <=> RNA(n)-3'-uridine ribonucleotide + diphosphate
rna(n) + utp <=> rna(n)-3'-uridine ribonucleotide + diphosphate
RNA(n) + UTP <=> RNA(n)-3'-uridine ribonucleotide + diphosphate
rna(n) + utp <=> rna(n)-3'-uridine ribonucleotide + diphosphate