Membrane Lipids and Cell Regulation 
the Hormel Institute. If we find that semisyn- 
thetic arachidonic acid-containing phospho- 
lipids form tightly packed arrays in experimen- 
tally produced phospholipid monolayers and 
bilayers, we will expand our experiments to in- 
clude animal cell membranes. A demonstration of 
such tightly packed arrays in cell membranes 
would raise fundamental questions about the role 
of phospholipid domains in programming mem- 
brane-associated events. 
Fruiting bodies of the slime mold Dictyostelium, each a mass of spore cells supported by a thin 
column of stalk cells. 
Research of Richard Gomer. 
166 
