The amount of DNA between genetic markers in phage T4.
D002874:Chromosome Mapping; D003090:Coliphages / Q000032:analysis*; D004279:DNA, Viral / Q000032:analysis*; D003851:Deoxyribonucleases / Q000032:analysis; D005796:Genes; D008433:Mathematics; D009711:Nucleotides / Q000494:pharmacology
D004279:DNA, Viral; D009711:Nucleotides; D003851:Deoxyribonucleases