Ryoji Matsumoto,                                            June 19, 1994



Dear Ryoji 

As a control, once could mutate His residues 40, 80, and/or 187, which
occur far from the predicted binding region. They should not have any
effect on the binding capacity.

I also enclose a picture of the mMCP-7 model. It has Asp and Glu residues
(-) shown as gray balls and Arg, Lys, and His (+) residues shown with side 
chains and numbers.

Andrej
