Clinical Chemistry
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Clinical Chemistry 26: 754-759, 1980;
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Clinical Chemistry, Vol 26, 754-759, Copyright © 1980 by American Association for Clinical Chemistry

The contribution of assays for lymphocyte capping and creatine kinase to detection of the Becker-type dystrophy trait

BM Goldsmith, HD Gruemer, RJ Hawley, NA Pickard, HL Verrill, WE Nance, G Miller and RG Crawford

Members of three unrelated families with the mild Becker type of muscular dystrophy were subjected to lymphocyte capping tests and measurements of serum creatine kinase activity. Both tests correctly identified all nine affected males, but only the capping test was abnormal in seven of eight obligate carriers. The number of capped cells in carriers and affected persons with the Becker-type dystrophy was generally intermediate between those observed for individuals with the Duchenne trait and normal controls, thus potentially aiding in the differential diagnosis between the two myopathies. The lack of sensitivity of measurements of serum creatine kinase activity in identifying carriers is further complicated by the difficulty of establishing reliable reference intervals for this enzyme in 204 healthy controls. Detailed directions for the performance of the capping test are presented.




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Copyright © 1980 by the American Association for Clinical Chemistry.