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Purification of bovine urinary beta2-microglobulin and its biochemical characteristics
1Laboratory of Veterinary Internal Medicine, School of Veterinary Medicine and Animal Science, Kitasato University, Towada, Aomori, Japan.
Abstract:
In this study, bovine beta2-m was purified from urine by ion-exchange chromatography and gel chromatography, and the characteristics were compared with those of colostral beta2-m by the immunological reactivity, isoelectric points, peptide map, and amino acid sequence. The characteristics of purified urinary beta2-m were consistent with those of the colostral beta2-m. The urinary and colostral beta2-m possessed the same polypeptide chain consisting of 98 amino acids, and its molecular weight is 11.8 kDa. Furthermore, four isoforms of beta2-m were found. The isoelectric points were different from each other.
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