title: Delay in the incorporation of protein into virus nucleocapsid in Newcastle disease virus infected cells.
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002478:Cells, Cultured; D002499:Centrifugation, Density Gradient; D002501:Centrifugation, Zonal; D002642:Chick Embryo; D007930:Leucine / Q000378:metabolism; D009522:Newcastle disease virus / Q000254:growth & development / Q000378:metabolism*; D013053:Spectrophotometry; D013997:Time Factors; D014020:Tissue Extracts; D014764:Viral Proteins / Q000096:biosynthesis / Q000378:metabolism*
chemical_list: D002247:Carbon Isotopes; D014020:Tissue Extracts; D014764:Viral Proteins; D007930:Leucine