further fractionation of myoblast microsomes on sucrose density gradients showed co-localization of the 50 kda and 20 kda proteins with microsomal subfractions which preferentially bind [ 3h-alpha ] bungarotoxin , suggesting that the proteins induced by 25 ohd3 are associated to plasma membranes and may play a role in the effects of the sterol on cell phosphate uptake .
C0007603
plasma membranes
C0007634
cell