This model represents the class I subfamily of poly(R)-hydroxyalkanoate synthases, which polymerizes hydroxyacyl-CoAs with three to five carbons in the hydroxyacyl backbone into aliphatic esters termed poly(R)-hydroxyalkanoic acids. These polymers accumulate as carbon and energy storage inclusions in many species and can amount to 90 percent of the dry weight of cell. [Fatty acid and phospholipid metabolism, Biosynthesis]
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