Table 1

Spontaneous mutagenesis rate

Cell line
Ba/F3-EPORBa/F3-JAK2wtBa/F3-JAK2V617F
HPRT locus    
    Resistance 6-TG 6-TG 6-TG 
    Mutation frequency 8.5 × 10−5 ± 0.2 × 10−5 1.7 × 10−5 ± 4.3 × 10−5 7.4 × 10−3 ± 5.9 × 10−3 
    Mutation rate (rate/cell per generation)40  3.1 × 10−5 ± 5.0 × 10−5 1.6 × 10−5 ± 1.9 × 10−5 1.1 × 10−3 ± 0.9 × 10−3 
    Mutation rate (locus/cell per generation)39  2.0 × 10−5 ± 0.6 × 10−5 6.0 × 10−5 ± 0.8 × 10−5 NA 
Na/K-ATPase locus    
    Resistance Ouabain Ouabain Ouabain 
    Mutation frequency 2.2 × 10−5 ± 5.3 × 10−5 1.5 × 10−5 ± 3.7 × 10−5 3.9 × 10−4 ± 5.5 × 10−4 
    Mutation rate (rate/cell per generation)40  1.7 × 10−5 ± 2.1 × 10−5 1.6 × 10−5 ± 1.8 × 10−5 1.2 × 10−4 ± 1.5 × 10−4 
    Mutation rate (locus/cell per generation)39  7.1 × 10−6 ± 0.8 × 10−6 5.3 × 10−6 ± 0.9 × 10−6 7.2 × 10−5 ± 0.5 × 10−5 
Cell line
Ba/F3-EPORBa/F3-JAK2wtBa/F3-JAK2V617F
HPRT locus    
    Resistance 6-TG 6-TG 6-TG 
    Mutation frequency 8.5 × 10−5 ± 0.2 × 10−5 1.7 × 10−5 ± 4.3 × 10−5 7.4 × 10−3 ± 5.9 × 10−3 
    Mutation rate (rate/cell per generation)40  3.1 × 10−5 ± 5.0 × 10−5 1.6 × 10−5 ± 1.9 × 10−5 1.1 × 10−3 ± 0.9 × 10−3 
    Mutation rate (locus/cell per generation)39  2.0 × 10−5 ± 0.6 × 10−5 6.0 × 10−5 ± 0.8 × 10−5 NA 
Na/K-ATPase locus    
    Resistance Ouabain Ouabain Ouabain 
    Mutation frequency 2.2 × 10−5 ± 5.3 × 10−5 1.5 × 10−5 ± 3.7 × 10−5 3.9 × 10−4 ± 5.5 × 10−4 
    Mutation rate (rate/cell per generation)40  1.7 × 10−5 ± 2.1 × 10−5 1.6 × 10−5 ± 1.8 × 10−5 1.2 × 10−4 ± 1.5 × 10−4 
    Mutation rate (locus/cell per generation)39  7.1 × 10−6 ± 0.8 × 10−6 5.3 × 10−6 ± 0.9 × 10−6 7.2 × 10−5 ± 0.5 × 10−5 

Six cultures were used in 5 of the treatments, and 5 for HPRT with 6-TG resistance.

NA indicates not applicable.

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