confocal microscope: spinning-disk head (CSU-X1, Yokogawa), microscope stand
(IX81, Olympus), 488nm and 561nm laser combiner (ALC, Andor Technology), EMCCD
camera (iXon 897, Andor Technology), laser based focusing system (ZDC1,
Olympus), objective (60×/1.2 NA UPLSAPO 60XW water immersion lens,
Olympus), image acquisition software (MetaMorph 7.7.7.0, Molecular Devices),
stage top humidified chamber (INU-ZILCS-F1, Tokai Hit), whole microscope
37°C chamber (custom designed by HMS Cell Biology machine shop), Semrock
barrier filters (525/40, 607/36), Semrock dicroic mirror (405/488/568/647).
Wavelengths of the excitation laser beam were 488 and 561 nm and fluorescence
for mEGFP and mCherry was detected using 488/568 nm Yokogawa emission filter
(Em01-R488/568-15, Semrock). Images were collected using the maximum field of
view with 512 × 512 image size. Timelapse images were collected with the
frame acquisition rate ranged from 1.0 to 30 s per frame (indicated in the video
legend).