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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Protein Expr Purif. 2015 Feb 14;110:89–94. doi: 10.1016/j.pep.2015.02.007

Fig. 1.

Fig. 1

Expression levels of histones in the host bacteria BL21(DE3) are variable. Histones were expressed using the starter cultures grown overnight at 37 °C with a supplement of 0.4% glucose (lanes 1) or its omission (lanes 2). Lanes 3; cells were not saturated before protein induction. M; size markers (kDa).