Figure 8From: Sequence analysis and structure prediction of type II Pseudomonas sp. USM 4–55 PHA synthase and an insight into its catalytic mechanismSurface presentation of the active site containing the proposed catalytic residues shown as the stick models (red = Asp451, light purple = His479, orange = Cys296, dark purple = Ser297). These residues are located adjacent to each other and the close proximity between His479 and Cys296 favors the charge relay mechanism.Back to article page