Micromanipulation setup. (1) Wild M3Z (Leica) dissecting microscope. (2) Oil-pump syringe (DeFonbrune) for operating labeling pipette. (3) Microinjector (Nashirige) oil-filled micrometer syringe for operating the holding pipette. (4) Instrument holder for holding pipette. (5) Instrument holder for labeling pipette. (6) Instrument sleeve for labeling pipette. (7) Joystick for fine positioning of the instrument holder in the horizontal plane. (8) Coarse adjustment knobs for positioning the right micromanipulator.