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Sequence comparison of the P proteins in the central region (nt 106 to 121) and in the C-terminal region (nt 226 to 241) among pneumoviruses. The serine residues in these regions are underlined. RSV-A2, human RSV subgroup A2 strain; Long, human RSV subgroup A long strain; B18537, human RSV subgroup B strain 18537; MPV, human metapneumovirus; Bovine, bovine RSV; Avian, avian pneumovirus; Ovine, ovine RSV. Mutations introduced in each P protein mutant are indicated.
