Table 3.

Specific activities of PFK proteins in their cell extracts

Cell-free extract	Sp act of PFK (U/mg protein)
E. coli DF1010	0.0
E. coli K-12	0.329 ± 0.007
E. coli DF1010(pEXT20)	0.0
E. coli DF1010(pEXT20-K12B)	270.247 ± 4.289
E. coli DF1010(pEXT20-BN2)	0.328 ± 0.005