long wavelength uv illumination of 3t6 cells in the presence of greater than or equal to 20 microm bzatp at 4 degrees c , a nonpermeabilizing temperature , followed by removal of unbound bzatp , resulted in the efflux of 86rb+ and the release of a prelabeled pool of cytoplasmic nucleotides when the temperature was shifted to 37 degrees c .
C0007634
cells
C0010834
cytoplasmic