sis
(e.g.,
PhaA, PhaB, PhaC; [8]). In fact, the expression of these
genes
interacted with each other and could be induced at nutrient
limiting
conditions to synthesize specific monomers and polymers
of
PHAs. Moreover, several naturally-occurring microorganisms
have
capabilities for synthesis of PHAs at conditions of physiological
stress (e.g., nitrogen, magnesium limiting conditions; [9]).