the [ 3h ] dha dissociation constants were 0.63 +/- 0.15 nm ( n = 6 ) and 0.83 +/- 0.04 nm ( n = 5 ) for intact cells and cell membranes , respectively , with a binding site concentration for cells of 27,300 +/- 5,200 sites/cell ( n = 6 ) and for membranes 468 +/- 24 fmoles/mg protein ( n = 5 ) .
C0007603
cell membranes
C0007634
cells