Figure 1.
Confocal spectrum-scan micrographs of taxoid-pyrazoline labeled microtubules in live CHO cells. CHO cells were treated with 1 µM of taxoid-pyrazoline 1a (a, b) or 3a (d, e) for 30 min and the fluorescence spectrum-scan in the region of 428–608 nm (a, d) and the corresponding DIC images (b, e) were recorded with a Zeiss LSM 710 microscope; λex = 405 nm. The colors rendered in the fluorescence micrographs were λ-encoded (real color). Scale bar = 20 µm. The average intensities of the unsaturated fluorescence-labeled cytoskeleton areas in 10 selected cells were plotted to give the in-cell fluorescence spectrum of 1a (c) or 3c (f) along with the standard deviations.