Figure 2.

Bacterial Papillation Assay. Individual colonies of the white E. coli lacZ cc104 mutant colonies containing the dark blue microcolonies which are the GC→TA revertants. Panel A shows the high spontaneous mutation frequency of the mutM mutY strain carrying only the vector. The remaining panels show the reduction in LacZ papillation in the mutM mutY strain resulting from the expression of either full length, (B) OXR1C; (C), full length NCOA7; (D), NCOA7 (657–942).

Durand et al. BMC Cell Biology 2007 8:13   doi:10.1186/1471-2121-8-13
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