Figure 2.

Tra2 is expressed at highest levels in the germline of male adults. Expression monitored using a β-galactosidase reporter transgene (C-lacZ) under the control of the tra2 promoter is shown. (A) Shows X-gal staining of testes (t) in comparison to malphigian tubules (mt), accessory glands (ac) and gut (g). A closeup view of the testis showing indicating staining of primary spermatocytes (bracket) is shown in (B). (C) Shows results from quantitative determination of β-galactosidase activity in extracts from various testes (T) and remaining carcass (C) in both normal w¹¹¹⁸ male adults (control) and transgenic flies carrying the reporter in the same genetic background. Standard errors are indicated by the lines.