Very similar to DH10B with F plasmid containing lacIq and Tn10 While DH10B has been classically reported to be galU galK, the preliminary genome sequence for DH10B indicates that DH10B (and by their lineage also TOP10 and any other MC1061 derivatives) is actually galE galK galU+. Tetracycline resistant Streptomycin resistant an MC1061 derivative [26]