Hemoglobin uses a change in shape to increase the efficiency of oxygen transport.
Binding of oxygen to haemoglobin
RCSB PDB - 2DN1: 1.25A resolution crystal structure of human hemoglobin in the oxy form
PDB-101: Molecule of the Month: Hemoglobin
PDB-101: Molecule of the Month: PDB Pioneers
Hemoglobin and Myoglobin: structures, oxygen binding curves, T-state and R-state of Hemoglobin
Hemoglobin and myoglobin oxygen binding curve explanation part 1
PDB-101: Learn: Videos
Oxygen transport: association and dissociation & Factors that affect hemoglobin's saturation with O2
PDB-101: Geis Archive: Hemoglobin
Irreversible alterations in the hemoglobin structure affect oxygen binding in human packed red blood cells - ScienceDirect
PDB-101: Geis Archive: Hemoglobin (1000)
PDB-101: Geis Archive: Hemoglobin (1000)