Sequence comparison of the polymerase gene of paramyxoviruses has revealed six highly conserved domains (I to VI), which are predicted to be essential for the key functions of RNA binding, RNA replication, and protein kinase activity [17], [18].
A Harpin Binding Site in Tobacco Plasma Membranes Mediates Activation of the Pathogenesis - Related Gene HIN1 Independent of Extracellular Calcium but Dependent on Mitogen - Activated Protein Kinase Activity