title: Different packaging of DNA in the filamentous viruses Pf1 and Xf.
mesh_terms: D001435:Bacteriophages; D002499:Centrifugation, Density Gradient; D004270:DNA, Circular; D004277:DNA, Single-Stranded; D004279:DNA, Viral / Q000032:analysis; D009711:Nucleotides / Q000032:analysis; D014764:Viral Proteins / Q000032:analysis
chemical_list: D004270:DNA, Circular; D004277:DNA, Single-Stranded; D004279:DNA, Viral; D009711:Nucleotides; D014764:Viral Proteins