Figure 2 : The Overall structure and the interactions in the subunits.

From: The three-dimensional structure of Clostridium absonum 7α-hydroxysteroid dehydrogenase: new insights into the conserved arginines for NADP(H) recognition

Figure 2

(A) Helix D and E mediate interactions in Q-axis-related subunits (subunit A and C, B and D). blue: basic residues; red: acidic residues; orange: polar residues; green: nonpolar residues. (B) The C segment mediates interactions in P-axis-related subunits. Green: subunit A; yellow: subunit D. (C) The polar interactions between subunits in the diagonal position of an asymmetric unit structure of CA 7α-HSDH.