Analysis of the formation of parallel arrays by BHK cells in vitro.

Abstract The contact behavior of BHK cells in tissue culture was studied in order to elucidate the mechanism for their formation of parallel arrays. It was found that when two arrays of cells meet at angles of less than 55 °, they merge and form a single array. At angles of contact greater than 55 °, these arrays crisscross. This same behavior was noted when two individual cells contacted each other. At angles up to 55 ° the contacting cell alters its direction of movement so that it comes to lie parallel to the contacted cell. At angles greater than 55 °, in contrast, crisscrossing occurs. Detailed analysis at high magnification showed that this behavior is dependent upon localized contact inhibition of cell movement.

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