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Fig. 5. Ice is required for some normally occurring cell death during
embryogenesis. (A-C) TUNEL stains of stage 14 embryos of different
genotypes. (A) Wild type; (B)
Ice
1; (C)
Ice+2.4; Ice
1.
(D-F) Stage 17 embryos of different genotypes, each of which carries
the P[sli-1.0-lacZ] enhancer trap line, which is expressed in midline glia.
(D) Wild type, (E) Ice
1 and (F)
Ice+2.4; Ice
1.
Embryos homozygous for Ice
1
lack maternal and zygotic Ice.