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. 2017 Jan 11;7:40515. doi: 10.1038/srep40515

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(a) Cartoon view of CAIP monomer (left) and dodecamer (right). Each subunit is shown in a different color. One of the three-fold molecular axes is in the center of the structure, perpendicular to the plane of the paper. (b) Qualitative surface electrostatic potential of CAIP (left) and HP-NAP (right). Positive charges are in blue, negative in red. A different charge distribution on the surface of the two proteins is evident.