Table II.

Change in the number of branch points, total length, and relative length distribution of ER profiles in electron micrographs during cell cycle

INTERPROMETAANATELO
Branch points102 ± 26101 ± 30*142 ± 31114 ± 30*95 ± 23*
Total length (μm)116 ± 14106 ± 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).