In contrast to what has been reported in mice, we observed elevated embryonic lethality in
brc-1 and
brd-1 null alleles [
brc-1(
xoe4),
brd-1(
xoe18) (Li et al. 2023; Li et al. 2018)], in combination with either
hsr-9(
ok759) (Ryu et al. 2013) or a new putative null allele
hsr-9(
xoe17) (Figure 1A).