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Left panel: Crystal packing analysis reveals a P2-symmetric dimer for Na-SLP-1 (571 Å2). Note the extended basic surface patch observed in the P2-symmetric dimer on the left. Right panel: Top-on (left) and face-on (right) views of the crystallographic dimer of Ac-SLP-1. A citrate molecule flanked by two HEPES molecules is bound in the acidic groove in a special position. Figure prepared with PyMOL [48].
