Abstract
It is widely observed that eukaryotic cells can polarize spontaneously in the absence of pre-established asymmetric cues. This phenomenon indicates that the principle of self-organization may be central to the establishment of cell polarity. Modelling work, as well as recent experimental data from several organisms, suggests that a combination of local positive feedback loops and global inhibitors could result in robust cell symmetry breaking through amplification of minute, stochastic variations.
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