| abstract |
A modified haemoglobin for use as an oxygen carrier in a blood substitute is prepared by covalently bonding haemoglobin or a haemoglobin derivative to a polyalkylene glycol, via an amide bond. A carboxyl group is first introduced onto the polyalkylene glycol, and is then reacted with an amino group of the haemoglobin or haemoglobin derivative to form the amide bond. |