Docking of SP and fibronectin.

(A) Diagram shows the sequence of SP denoting head and tail regions. Electrostatic potential on the side chains for SP residues are shown: positive (+), negative (−), and neutral (n). (B) Three-dimensional model of SP–FN interaction. Relative electrostatic potential was mapped on the solvent accessible surface of each molecule. Blue-violet represents negatively charged areas, and yellow-red represents positively charged regions. SP is outlined in white.