Fig. 4. Phosphoprotein tetramer in complex with L.

a NDV L is shown as a gray molecular surface, and P monomers are shown in cartoon. The P monomer is colored as a blue-to-red rainbow from the N- to the C-terminal end. b Structures of the four individual P subunits bound to L. c, d Comparison of L-P complexes between NDV and hMPV. The right region is rotated 90° along the horizontal axis.