TABLE 2.

PDH activity of the wild type and pdh mutants

Strain	Relevant genotype	PDH activitya
JH642	pdh+	0.111 ± 0.002
501-76	ΔpdhB	0.000 ± 0.002
501-77	ΔpdhC	0.000 ± 0.002
501-78	ΔpdhD	0.000 ± 0.002
501-76 + 501-77b	ΔpdhB + ΔpdhC	0.013 ± 0.002
501-77 + 501-78b	ΔpdhC + ΔpdhD	0.009 ± 0.002

^aChange in absorbance at 366 nm per minute per milligram of protein. Values are means ± standard errors.

^bMixture of equal amounts (protein concentration) of cell extract from each mutant.