Figure 5
From: Structure and characterization of a novel chicken biotin-binding protein A (BBP-A)
The overall X-ray structure of chicken BBP-A. (a, b) A tetrameric ribbon model of the BBP-A – BSO structure. (c, d) Electrostatic potentials mapped onto the molecular surface of the BBP-A – BSO structure. (e, f) Electrostatic potentials mapped onto the molecular surface of the AVD [PDB: 2AVI] [23] structure after superimposition on the BBP-A structure. The views shown in (a), (c) and (e) are rotated 45° around the X-axis in (b), (d) and (f). The BSO and BTN ligands of the BBP-A – BSO and AVD structures, respectively, are shown as spheres. The yellow arrows pinpoint visible parts of the valeric acid tails of BSO and BTN seen in (d), (e) and (f).