Tangential flow affinity ultrafiltration

Abstract From the Canadian patent

Biological macromolecules are separated from liquid mixtures in which they are contained, in substantially pure form, by a process involving tangential flow ultrafiltration of the liquid mixture in the presence of an affinity gel which binds selectively to the biological macromolecule to be recovered in pure form, in either the positive affinity absorption mode or the negative affinity absorption mode. Thus a mixture containing the biological macromolecule of interest such as hemoglobin or (oxy)hemoglobin is first mixed with an affinity gel, such as agarose-ATP, which selectively binds to the hemoglobin or (oxy)hemoglobin and then the liquid is subjected to tangential flow ultrafiltration …