Abstract
Haemoglobins from diabetic and non-diabetic individuals have been separated by affinity chromatography using immobilized phenylboronate, which interacts specifically with diol-containing compounds such as glycosylated haemoglobin. The effects of ligand concentration, flow rate, column geometry, preincubation of sample, buffer composition and temperature have been investigated. Significant correlation was found between results from affinity-chromatography and ion-exchange and isoelectric-focusing methods. Isoelectric-focusing of the haemoglobin fractions obtained from affinity chromatography indicate that, in addition to haemoglobin A1c, some haemoglobin A is also bound to immobilized phenylboronic acid. Assays of haemolysates obtained from red blood cells incubated in glucose solutions suggest that unstable pre-(haemoglobin A1c) does not interfere. The assay is not affected by the presence of haemoglobin F.
MeSH Terms
Boronic Acids
Buffers
Chromatography, Affinity/methods
Chromatography, Ion Exchange
Diabetes Mellitus/blood
Glycated Hemoglobin A/isolation & purification
Humans
Hydrogen-Ion Concentration
Isoelectric Focusing
Ligands
Magnesium
Magnesium Chloride
Temperature
Chemicals
Boronic Acids
Buffers
Glycated Hemoglobin A
Ligands
Magnesium Chloride
Magnesium
benzeneboronic acid
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Middle F A
Bannister A
Bellingham A J
Dean P D
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19 references, click to expand
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