and a LXXLL-containing coactivator peptide. Biochemistry 2004, 43:4101-4110. 5. Vanhooke JL, Tadi BP, Benning MM, Plum LA, DeLuca HF: New analogs of 2-methylene-19-nor-(20S)-1,25-dihydroxyvitamin D3 with conformationally restricted side chains: evaluation of biological activity and structural determination of VDR-bound conformations.