Fig. 1
The tgct mutants develop GCTs because of impaired germ-cell differentiation. Compared with adult wild-type males (A and C) (arrowhead: normal testis), adult tgct males display marked testicular enlargement (B and D) (arrow: testicular tumor). Wild-type testis (E) exhibits normal spermatogenesis (arrowhead: spermatogonia; arrow: spermatozoa). The tgct mutant testis (F) accumulates primitive germ cells. Although wild-type ovary (G) shows all stages of oocyte maturation up to mature stage IV oocytes, oocyte maturation is impaired in tgct homozygous females (H). [Scale bars: 100 μm (E and F); 50 μm (G and H).]