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Southern blot of Heterodera schachtii DNA. Genomic DNA digested with HindIII/HincII (lane 1), HincII (lane 2), HindIII (lane 3) and EcoRI (lane 4). The blot was probed with a radioactively labelled chorismate mutase (CM) fragment. Positive control: Hscm1 fragment cloned in pGEM‐T (lane 5). Fragment sizes derived from a standard are indicated on the right in kilobase pairs.
