TABLE 1.

Complementation of the ETBE-negative mutant IFP 2006 by the pGT222 and pGT223 plasmids carrying the ethRABCD genes and the ethRABC genes, respectively

R. ruber strain	Doubling time on minimal medium + ETBE (h)	ETBE-degrading activity (pmol min−1 OD600−1) of resting cells grown on:
		ETBE	Glucose + ETBE
IFP 2001	10	1,930	372
IFP 2006(pRE-7)	≥150	NDa	<1
IFP 2006(pGT222)	10	1,341	140
IFP 2006(pGT223)	≥150	ND	12

^aND, not done.