[protein-PII]-L-tyrosine + UMP + H(+) => [protein-PII]-uridylyl-L-tyrosine + H2O
[protein-pii]-l-tyrosine + ump + h(+) => [protein-pii]-uridylyl-l-tyrosine + h2o
[protein-PII]-L-tyrosine + UMP + H(+) => [protein-PII]-uridylyl-L-tyrosine + H2O
[protein-pii]-l-tyrosine + ump + h(+) => [protein-pii]-uridylyl-l-tyrosine + h2o