Fig. 2: Dimer-dimer rotation angles.
From: The unique allosteric property of crocodilian haemoglobin elucidated by cryo-EM
The α1β1 dimers of different Hb models (shown as ribbons) were first superposed on those of the crystallographic model of deoxy human HbA (PDB 2dn2), and then the α2β2 dimers (shown as tubes) were overlaid. The rotation angle of the second least-squares fit is indicated. The deoxy human HbA model is shown in dark grey. a deoxy HbAM, orange. b oxy-HbAM, red. c crystal model of R-state carbonmonoxy human HbA (PDB 2dn3), green. d carbonmonoxy HbAM, blue. e carbonmonoxy human HbA, purple. f crystal model of R2-state carbonmonoxy human HbA (PDB 1bbb), white.
