Fig 4.
(Upper) Northern analysis of poly(A) RNA. Lane 1, D. melanogaster line A1 at 5 months after transformation; lane 2, D. melanogaster line A1 at 11 months after transformation; lane 3, D. melanogaster line A2 at 11 months after transformation; lane 4, D. melanogaster control strain y w67c23(2); lane 5, D. virilis dysgenic hybrids. (Lower) Northern analysis of total RNA isolated from different tissues. Lanes 1–3, ovaries; lanes 4–6, carcasses; lanes 1 and 4, D. melanogaster control strain y w67c23(2); lanes 2 and 5, D. melanogaster line A1; lanes 3 and 6, D. virilis dysgenic hybrids. Arrows indicate the positions of the 2.8-kb transcript from the canonical Penelope element.