Which steroid is used for transformation?

Cholesterol forms a major component of animal cell membranes liposomes (artificially created spheres surrounded by a phospholipid bilayer like a membrane) are used for transformation (transgenics). Related Theory Steroids include drugs used to relieve swelling and inflammation, such as prednisone and cortisone; vitamin $D$; and some sex hormones, such as testosterone and estradiol.