SHORT COMMUNICATIONS 363
The concentrations of lecithin and free cholesterol in bile are more than double
their respective concentrations in serum 5. The secretion of such large amounts of
lipid in bile suggests an important role for these substances in the digestive processes.
This investigation was supported in part by a research grant (H-29o7) from the
National Heart Institute, U.S. Public Health Service, and in part by a research
grant from the American Heart Association.