Southern analysis of DSBs during meiosis at the
HIS2 locus. Cells were removed from sporulation medium
at the times indicated, and DNA was made, digested with
BglII, and analyzed as described. The numbers above the
lanes refer to the time in meiosis. The parental band A and the DSB
bands B and C are illustrated in the figure. The probe was the
BglII–EcoRI fragment shown on the
figure. The diploid used for the wild-type lanes was RM207
(his2-xho/HIS2 rad50S/rad50S, congenic to RM169). On the
right side of the figure are four time points from a congenic
rec104-Δ1/rec104-Δ1
rad50S/rad50S diploid (RM215). The lane labeled M contains
markers of sizes 5.2 kb, 3.9 kb, 3.2 kb, 3.0 kb, 2.9 kb, and 1.9 kb,
from top to bottom. All lanes shown were run on the same gel.