1EJG: Crambin At Ultra-High Resolution: Valence Electron Density.
reference: Accurate protein crystallography at ultra-high resolution: valence electron distribution in crambin., Jelsch C, Teeter MM, Lamzin V, Pichon-Pesme V, Blessing RH, Lecomte C, Proc Natl Acad Sci U S A 2000 Mar 28;97(7):3171-6. PMID: 10737790

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