3D location of acetylability related lysine groups. The view angles are labeled as A, B and C. The balls in yellow represent the acetylable lysine, while red for the un-acetylable in training set. The wired ellipsoids are 3D regions related to acetylability. The lysine only and whole nucleosome parts are contained in all three views. An additional surface colored by electronically potential is added to C on the right side.