FIG. 2.

Proposed structure of BphA1 based on crystallographic analyses of the naphthalene dioxygenase (A) and the proposed structure near the active site in BphA1 (B). (A) The amino acids surrounding the active iron site are shown in yellow, and those coordinated by the Rieske cluster are shown in green. (B) The yellow amino acids are considered to coordinate the active iron site and be involved in electron transfer. The amino acids in green and red are targets for site-directed mutagenesis.