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. 2000 Oct;10(10):1605–1616. doi: 10.1101/gr.151700

Figure 4.

Figure 4

Assessment of structural integrity of the X-linked extended P element ExtP1-7 by quantitative Southern analysis. (A) Genotypes of fly strains used for genomic copy-number comparison, shown with respect to the copy number of the genomic region encompassed by the extended P element (shown as a solid black bar) on the X chromosome (for ExtP1-7) and on the third chromosome. (B) The EcoRI restriction map of the genomic region encompassed by the extended P element. Genomic DNA is shown as a solid line with size kb above and the EcoRI restriction sites below. Specific EcoRI restriction fragments used for the copy-number comparison are labeled with bold letters a–m (Spradling 1981) and w–z. (C) Representative quantitative Southern hybridization results are shown for 16 EcoRI restriction fragments that were identified with 12 independent probes.