Biomedical subjects
Publications and source records attributed to D D Weaver.
A human XXY chromatin negative triploid culture has been found to have both the A and B isozymes of glucose-6-phosphate dehydrogenase, as well as an intermediately migrating AB (hybrid) band. This finding indicates that the cells in this culture each possess 2 active X chromosomes. Possible mechanisms producing the abnormalities seen in this disorder are presented and discussed.
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Expression of the rate of inactivation of isonicotinoyl hydrazide (INH) as a first-order constant gave better discrimination of slow and rapid inactivators than did the level of INH at the end of 6 hr. The most probable division point between the two classes was at k = 0.130. Rate of inactivation by obligatory heterozygotes was determined. Such heterozygotes could not be adequately differentiated from homozygous rapid inactivators. The gene frequency for slow inactivation was 0.46 +/-0.04 in Alaskan Eskimos and 0.62+/-0.06 in Athabaskan Indians.
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Benign hereditary chorea is an uncommon inherited form of childhood chorea that can be mistaken for much more serious disorders, such as Huntington disease. The clinical manifestations of this condition are reviewed, emphasizing the differential diagnosis, treatment modalities, and evaluation of childhood chorea.
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