Structural Studies of Molecules Involved in the Immune Recognition 
of Infected Cells 
molecule, which is still capable of binding to Fc 
molecules. We are currently working out a purifi- 
cation scheme for this protein and will try to crys- 
tallize the protein in preparation for an x-ray 
structure determination. We also have crystals of 
a structurally unrelated Fc receptor and will 
compare the binding of these two receptors to 
their common ligand. 
46 
