Analysis of DHS-11 to -16 in COLO 201, U-937, and HL-60 cells. All lanes are DNase I–treated DNA digested to completion with Bgl II and hybridized with a ³²P-labeled ELA2 exon IV/V cDNA probe. From left to right: C0, COLO 201 DNA not treated with DNase I; C1 to C3, COLO 201 DNA from nuclei treated with increasing concentrations of DNase I; H, HL-60 DNase I treated time-point; U, U-937 DNase I treated time-point. The locations of the DNA molecular weight markers used are shown on the left, and the location of DHS-11 to -16 are indicated by arrowheads on the right.