Abstract
Class IV polyhydroxyalkanoate (PHA) synthase from Bacillus cereus YB-4 (PhaRCYB4) or B. megaterium NBRC15308T (PhaRCBm) was expressed in Ralstonia eutropha PHB−4 to compare the ability to produce PHA and the substrate specificity of PhaRCs. PhaRCYB4 produced significant amounts of PHA and had broader substrate specificity than PhaRCBm.