Table II.
Change in the number of branch points, total length, and relative length distribution of ER profiles in electron micrographs during cell cycle
| INTER | PRO | META | ANA | TELO | |
|---|---|---|---|---|---|
| Branch points | 102 ± 26 | 101 ± 30* | 142 ± 31 | 114 ± 30* | 95 ± 23* |
| Total length (μm) | 116 ± 14 | 106 ± 15* | 115 ± 13* | 111 ± 13* | 111 ± 19* |
| 0.040–0.149 μm (%) | 12 ± 3 (154 ± 44) | 20 ± 7 (225 ± 82) | 28 ± 3 (360 ± 54) | 25 ± 6 (311 ± 82) | 20 ± 4 (233 ± 36) |
| 0.150–0.399 μm (%) | 33 ± 4 (153 ± 22) | 41 ± 7 (179 ± 36) | 49 ± 3 (234 ± 30) | 47 ± 4 (215 ± 33) | 39 ± 6 (177 ± 30) |
| 0.400–0.999 μm (%) | 31 ± 5 (61 ± 10) | 28 ± 5* (53 ± 13) | 22 ± 4 (48 ± 12) | 27 ± 7* (53 ± 15) | 24 ± 4 (47 ± 10) |
| 1.000–2.499 μm (%) | 14 ± 5 (11 ± 5) | 6 ± 6 (5 ± 5) | 1 ± 1 (1 ± 1) | 1 ± 1 (1 ± 1) | 7 ± 5 (5 ± 4) |
| ≥2.500 μm (%) | 11 ± 5 (3 ± 2) | 4 ± 5 (1 ± 1) | 0 ± 0 (0 ± 0) | 0 ± 0 (0 ± 0) | 12 ± 9* (3 ± 2)* |
The branch points and the total length of ER profiles are presented as the mean value per 100 μm2 of ER area ± SD. Relative length distribution of ER profiles are presented as the proportion (%) of each category ± SD, and the number of ER profiles per 100 μm2 of ER area in each length category ± SD is shown in parentheses. The values in all mitotic groups were statistically different from interphase (P < 0.05), except in those marked with an asterisk. INTER = interphase (n = 22 cells), PRO = prophase to prometaphase (n =18 cells), META = metaphase (n = 15 cells), ANA = anaphase (n = 14 cells), TELO = telophase (n = 18 cells).