Fig. 7
Zebrafish Vasa induces germ cells and binds to Drosophila Osk.
(A-C) 16-cell assay showing germ cell formation (white arrowhead) after injection with vasa mRNA (A; 73.9±5.3%; n = 60; p = 0.01) but not with hermes (B; 22.9±4.8%; n = 60). Scale bar (A, B 200 μm (C) Quantification of injection results (three independent experiments for each RNA). Error bars represent standard deviation of the mean. Student’s t-test; P-value: **<0.01. (D) Western blot of Buc-GFP, Osk-GFP, and GFP-control together with Vasa after in vitro translation (input = 40% of pulldown) and after GFP-pulldown. Vasa (upper panel, magenta in merged panel) interacts with Buc and Osk, but not GFP controls (middle panel, green in merged panel). (M: molecular weight marker lane) (E) Western blot of Buc-GFP, Bucp43-GFP (1–361), and Bucp106-GFP (1–601) (middle panel, green in merged panel) together with Vasa (upper panel, magenta in merged panel) after in vitro translation (input = 40% of pulldown) and after GFP-pulldown. Vasa interacts with Buc, Buc(1–361) and Buc(1–601).