radioreceptor assay and sucrose density gradient analysis of the cytosol showed that ku-2 cells contained a 3.2s receptor protein to which 1 alpha,25-dihydroxyvitamin d3 was specifically bound ( kd = 20.8 +/- 4.8 pm , nmax = 87 +/- 24 fmole/mg protein , 4000 molecules/cell ) .
C1383501
cytosol
C0007634
cell