RCN recombinants expressing rabies virus glycoprotein or nucleoprotein were created. Their classification is based on the nucleoprotein (N) or previously the fusion (F) protein gene. This forms a nucleoprotein complex termed the partition complex. The same RecA-ssDNA nucleoprotein posttranslationally modifies the UmuD protein into UmuD' protein. In the RNP, genomic RNA is tightly encased by the nucleoprotein. In the cytoplasm, ribosomal RNA and protein combine to form a nucleoprotein called a ribosome. Broadly sensitive universal gene targets are the nucleoprotein, the matrix or the S2 encoding genes. Conditional deletion of TERF2 in mice cells effectively removes the shelterin nucleoprotein complex. In thogotoviruses, segment 4 encodes the glycoprotein and segment 5 the nucleoprotein. However, further investigations indicated that "antibodies to influenza nucleoprotein cross-react with human hypocretin receptor 2". It forms rigid nucleoprotein filaments causing the straitening of DNA and not the bending.