Bacillus megaterium article 14 poly(3 hydroxybutyric acid) 12 nonhuman 10 Bacteria (microorganisms) 6 Polyesters 6 bacterial growth 6 controlled study 6 enzyme activity 6 priority journal 6 Escherichia coli 4 Gene Expression Regulation, Bacterial 4 Hydroxybutyrates 4 Posibacteria 4 Prokaryota 4 bacillus megaterium 4 hydroxybutyric acid 4 isolation and purification 4 isoleucine 4 phosphotransbutyrylase 4 poly-beta-hydroxybutyrate 4 polyester 4 protein expression 4 survival 4 unclassified drug 4 valine 4 Acyltransferases 2 Alcaligenes 2 Amino Acid Sequence 2 Amino Acids, Branched-Chain 2