Piotr: Setup of overnight culture E. coli TOP10 (LB broth) and Rosetta (LB broth + chloramphenicol) for preparation of chemocompetent bacteria. TOP10 (Invitrogen) F- mcrA Δ(mrr-hsdRMS-mcrBC) φ80lacZΔM15 ΔlacX74 nupG recA1 araD139 Δ(ara-leu)7697 galE15 galK16 rpsL(StrR) endA1 λ- Rosetta(DE3)pLysS F- ompT hsdSB(RB- mB-) gal dcm λ(DE3 [lacI lacUV5-T7 gene 1 ind1 sam7 nin5]) pLysSRARE (CamR)