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. 2020 Mar 27;9:e55007. doi: 10.7554/eLife.55007

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© 2020, Lacin et al

This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.

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Figure 7. — (A–B) Unc-4 expression (magenta) in the T1/T2 region of the VNC shown. (A) Unc-4 expression in T1 12A and T2 7B neurons are outlined with dashed lines. (B) NB3-2-GAL4 (ey^AD;dbx^DBD) driven FLP removes Unc-4 expression specifically from 7B neurons. (C–D) Sequences of still images shown from videos recording the response of flies to a looming stimulus. (C) The control animal exhibited a stereotyped take-off behavior. It first raised its wings, and then extended its T2 legs (arrow) to take off. (D) The NB3-2 specific Unc-4 knock-out animal exhibited an interrupted take-off behavior. It responded to the looming stimulus and raised its wings. It attempted to jump by lifting its hindleg (arrowhead) but did not extend its T2 legs (arrow), thus failed to take off. See also Videos 14 and 15. (E) The percentage of animals that showed interrupted take-off behavior shown. See Materials and methods section for more information. The time under each image is in milliseconds and indicates the elapsed time after the visual stimulus. Scale bar is 20 microns.

Figure 7—figure supplement 1. — (A–B) Unc-4 expression (magenta) in the T1/T2 region of the VNC shown. (A) Unc-4 expression in T1 12A and T2 7B neurons are outlined with dashed lines. (B) NB3-2-GAL4 (ey^AD;dbx^DBD) driven FLP removes Unc-4 expression specifically from 7B neurons. (C–D) Sequences of still images shown from videos recording the response of flies to a looming stimulus. (C) The control animal exhibited a stereotyped take-off behavior. It first raised its wings, and then extended its T2 legs (arrow) to take off. (D) The NB3-2 specific Unc-4 knock-out animal exhibited an interrupted take-off behavior. It responded to the looming stimulus and raised its wings. It attempted to jump by lifting its hindleg (arrowhead) but did not extend its T2 legs (arrow), thus failed to take off. See also Videos 14 and 15. (E) The percentage of animals that showed interrupted take-off behavior shown. See Materials and methods section for more information. The time under each image is in milliseconds and indicates the elapsed time after the visual stimulus. Scale bar is 20 microns.