PHA accumulation by E. coli JMU193(pET702, pCK01-alkS, pCY323) as a function of DCPK concentration. Cells were cultivated in E2 minimal medium with 1% (wt/vol) gluconate, antibiotics, 0.01% (wt/vol) arabinose, and DCPK as indicated. Samples were obtained 25 h (shaded bars) and 44 h (open bars) after the cells reached the stationary phase, lyophilized, and analyzed by GC.