Function 
Nucleoproteins (NP) are proteins associated with DNA or RNA[1].  NPs which contain RNA are called ribonucleoproteins (RNPs).  The NP RNA-recognition motif is named RRM.
The small nuclear ribonucleoproteins (snRNPs) are RNA-protein complexes which form part of the spliceosome[2].  For details on SnRNP see Azoarcus group I intron.
The heterogenous nuclear ribonucleoproteins (hnRNP) are RNA-protein complexes which associates with the splicing apparatus and prevent the folding of pre-mRNA[3]. 
For details on heterogenous nuclear ribonucleoproteins see HnRNP A1.
For homology model and multiple sequence alignment see User:Michael Strong/H1N1/NP and User:Michael Strong/H1N1/NP/MSA.
For details on HIV-1 nucleoprotein see HIV-1 Nucleocapsid Protein (NC).
  Structural highlights 
-  in Nucleoprotein from Lassa virus (3mx2). Water molecules are shown as red spheres.
- . 
  3D Structures of Nucleoprotein 
Nucleoprotein 3D structures