Reincorporation of CLSE disks during expansion. Fluorescence micrographs in A, B, and C were recorded at [surface pressure (mN/m), molecular area (Å2/phospholipid molecule)] of [44.5, 36.2]; [39.4, 38.5]; and [1.7, 83.3]. Image D is a simultaneous FM and LSM image at [1.7, 83.3]. Scale bar, 10 μm.