opening of tight junctions or addition of the probe to cell suspensions resulted in a homogeneous distribution of tma-dph over the cell surface and in a marked decrease in anisotropy ( 0.27 less than or equal to r less than or equal to 0.29 ) that was due neither to a direct effect of ca2+ on the probe nor to a change in fluorescence lifetime .
C0242358
tight junctions
C0007634
cell