Figure 1.

Southern analysis of Arabidopsis SHM1 and SHM4. Ecotype Columbia genomic DNA was digested with BglII, EcoRI, EcoRV, or XbaI and hybridized at high stringency with gene-specific probes to SHM1, and, after the membrane was stripped, to SHM4. The molecular mass marker was a 1-kb DNA ladder (Gibco-BRL, Gaithersburg, MD) and the corresponding molecular masses are indicated.