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Fig. 3. pum mutant germ cells require zpg for differentiation.
Ovaries from flies of the indicated genotypes were stained with anti-Vasa
(green) and the mAb 1B1 antibody (red). pum mutant ovarioles were
either devoid of germ line (B), or had a few defective, but differentiated,
egg chambers and an empty germarium (A). zpg, pum double-mutant
ovaries resembled zpg ovaries, with only a few germ cells at the tip
of the ovariole, except that a few more germ cells were present. More cysts
and egg chambers were also observed (D, arrow). Scale bar: in A, 20 µm; in
B, 50 µm for B-D.
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