[mass noun] A protein present in blood serum which binds to and removes free haemoglobin from the bloodstream.
- ‘Macrophages, scavenger-like cells that roam the body, have a surface receptor called CD 163 which binds the protein haptoglobin.’
- ‘The research team, led by Dr. Andrew Levy of the Faculty of Medicine, had earlier demonstrated that diabetics with a particular form of a blood protein called haptoglobin had as much as a 500% increased risk of developing heart disease.’
- ‘Ceruloplasmin, [alpha.sub.2] macroglobulin, and haptoglobin contribute to the [alpha.sub.2] protein band.’
- ‘Deer in fact may be a little unusual in this respect in that they have unusually, low levels of another protein haptoglobin, which is involved in the clearance of haemoglobin.’
- ‘Evidence of hemolytic anemia may be present, including decreased haptoglobin.’
1940s: from Greek haptein fasten + (haemo)globin.