frequencies of chromatid aberrations in phytohemagglutinin-stimulated blood lymphocytes collected by demecolcine from 0.5 hour to 1.5 hours after x irradiation with 58 roentgens were twofold to threefold higher in a-t heterozygotes than in clinically normal controls and twofold to three-fold higher in a-t patients ( homozygotes ) than in a-t gene carriers .
C0004135
a-t
C1705846
a-t gene