The cryptogenic factor in lambda.
D002499:Centrifugation, Density Gradient; D002874:Chromosome Mapping; D003090:Coliphages / Q000528:radiation effects; D003433:Crosses, Genetic; D003673:Defective Viruses; D005827:Genetics, Microbial; D008242:Lysogeny; D009154:Mutation; D014466:Ultraviolet Rays