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Movies from real research: Early polarisation of the C.elegans embryo and spindle rotation

Early development of the C. elegans embryo showing polarisation and spindle movement within the cell, preceding cell division. The two centrosomes are seen to move towards the center of the embryo where they rotate 90° before the formation of the spindle which then moves towards the left, to give rise to an asymmetric cell division with the cell on the left becoming the posterior one. Movie courtesy Stephan Grill.