diphtheria toxin-resistance markers in two translational mutants , ch-re1.22c , possessing no toxin-sensitive ef-2 ( class iia ) , and ch-re1.32 , with 50 % toxin-sensitive and 50 % toxin-resistant ef-2 ( class iib ) , behaved codominantly in somatic cell hybrids .
C1519614
translational
C0059037
ef-2