TY - JOUR TI - Rotation in Xenopus laevis embryos during the second cell cycle AU - Starodubov, SergeyM. AU - Golychenkov, VladimirA. T2 - The International Journal of Developmental Biology AB - Using time-lapse video recording and comparing successive digital images, we found that 38% of Xenopus laevis embryos (n=118) exhibited rotation during the second cell cycle. This rotation, which we term the second rotation, started approximately during the appearance of the first cleavage furrow and proceeded clockwise or counterclockwise around the vertical axis. Rotations lasted for 5-30 minutes, i.e. up to the beginning of the third cell cycle. The mean rotation angle was 36.4˚, with a maximum rotation of 77˚. No mortality was observed among the embryos exhibiting rotation. The second rotation was observed to be similar to the well-known fertilization rotation which takes place during the first cell cycle. The possible nature and significance of the second rotation are discussed. PY - 2009 DO - 10.1387/ijdb.062266ss VL - 53 IS - 1 SP - 135 EP - 137 J2 - Int. J. Dev. Biol. LA - en SN - 0214-6282 SN - 1696-3547 UR - https://ijdb.ehu.eus/article/062266ss Y2 - 2024/12/22/12:23:05 ER -