[protein-PII]-L-tyrosine + UTP => [protein-PII]-uridylyl-L-tyrosine + diphosphate
[protein-pii]-l-tyrosine + utp => [protein-pii]-uridylyl-l-tyrosine + diphosphate
[protein-PII]-L-tyrosine + UTP => [protein-PII]-uridylyl-L-tyrosine + diphosphate
[protein-pii]-l-tyrosine + utp => [protein-pii]-uridylyl-l-tyrosine + diphosphate