A Molecular Dance in the Blood, Observed

Human hemoglobin, in your blood cells, displays precise changes in internal cooperativity in response to exactly how the first two oxygens bind to it.

LiCata V (1990) Resolving Pathways of Functional Coupling in Human Hemoglobin Using Quantitative Low Temperature Isoelectric Focusing of Asymmetric Mutant Hybrids. PhD Thesis (Johns Hopkins University), via the 2009 AAAS/Science Dance Contest