AbstractPronase is a proteolytic enzyme recently introduced as an effective dispersing agent of tissue culture cells. We have found it to be a most rapid and complete dispersing agent for primary fibroblastic cell lines and clearly superior to trypsin. On the other hand, with certain continuous epithelial cell lines its completeness of dispersion is inferior to that of trypsin necessitating study of each cell line individually with both enzymes to select the most advantageous one.
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