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Fig. 4. stwl was not required for bam silencing and suppressed
differentiation independently of bam. Spectrosomes/fusomes are
labeled red in each panel. (A) bam transcriptional reporter
(green) activity in wild-type germarium. (B) bam
transcriptional reporter activity in stwl bam double mutants. Arrows
and arrowheads indicate GSCs and cytoblasts, respectively. (C) Germ
cells (stained green with anti-Vasa) in bam mutant ovaries contained
spherical spectrosomes (red). (D) Elongated fusomes indicative of cyst
formation (encircled) in stwl bam mutant ovaries. DNA is blue in
C,D.