Abstract
A quantitative assay for intercellular adhesion, which is a modification of the collecting aggregate assay (Roth et al., '71) is described. The use of mechanically dissociated single cells labeled with 3H-leucine, and of a gyratory shaker increased considerably the efficiency of cell collection. With chick embryo neural retina, it was shown that isotypic cell adhesion occurs in simple synthetic media and even in sodium chloride solution suggesting that divalent cations do not play a major role in adhesion of these cells. Cell collection in media without serum was not affected by metabolic or protein synthesis inhibitors. However, cell adhesion was temperature-dependent since no collection occurred at 4 degrees C but was maximal at 38 degrees C.
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