Chatterjie N, Brockerhoff H
Biochim Biophys Acta. 1978 Jul 20;511(1):116-9. doi: 10.1016/0005-2736(78)90069-x.
The CH2 proton NMR linewidths of sn-3 and sn-1 dipalmitoyl phosphatidylcholine respond differently to the addition of cholesterol to the lipid vesicles. This result points to a stereospecific phospholipid-cholesterol interaction in the "hydrogen belt" region.