Table 5.

Cellular components of E. coli strains BL21, BL21/pOri1 and BL21/pOri2 cultured in the chemostat system at different growth rates.

Component	Biomass g (g biomass)-1
	Various growth ratesa			0.2 h-1
	BL21	BL21/pOri1	BL21/pOri2	All strains
Protein	0.620	0.615	0.611	0.610
Lipid	0.119	0.109	0.102	0.102
RNA	0.185	0.200	0.205	0.211
Chromosomal DNA	0.031	0.031	0.031	0.031
Plasmid	0	0.0002	0.0019	b
LPS	0.015	0.015	0.015	0.015
Peptidoglycan	0.015	0.015	0.015	0.015
Glycogen	0.015	0.015	0.015	0.015

^a The following growth rates were determined when bacteria were cultured in the batch cultivation: BL21, 0.46 h^-1; BL21/pOri1, 0.39 h^-1; BL21/pOri2, 0.29 h^-1.

^b Plasmid DNA concentrations in BL21, BL21/pOri1, and BL21/pOri2 were 0, 0.0004, and 0.0020 g (g biomass)^-1, respectively.