| Abstract: | The hypothesis that there is impaired endogenous synthesis of glucosamine 6-phosphate in Huntington's-chorea fibroblasts was tested by double labelling matched pairs of fibroblasts in culture with carrier-free H3 32PO4 and U-14C]glucosamine. The 32P]UDP-N-acetyl14C]glucosamine and 14C]glucosamine 6-32P]phosphate of the cellular soluble fraction was isolated by charcoal column and paper chromatography. There is no quantitative difference in 32P but a significant difference in 14C in these two sugars in a ratio of approx. 1.5 for Huntington's-chorea fibroblasts compared with normal fibroblasts. |
