FIG. 4.

Overview of the regiospecificity of CB dioxygenation by BphA-B4h and -LB400. Regiospecificities of attack are symbolized by O₂ molecules with arrows. Relative quantities are indicated as follows: black arrows, >33% of total dioxygenation; gray arrows, 10 to 33% of total dioxygenation; light gray arrows, <10% of total dioxygenation. For experimental evidence of site assignments and further details, see the text and Table 1. A lack of experimental evidence for the assignment of an oxidation site is indicated by “S?”; a lack of experimental evidence for the assignment of the relative quantity of oxidation is indicated by “Q?”