PhzC/PhzF is involved in dimerisation of two 2,3-dihydro-3-oxo-anthranilic acid molecules to create PCA by P. fluorescens [1]. This family also contains Swiss:P28176, though there is no significant sequence similarity to Pfam:PF00303 members. This family appears to be distantly related to Pfam:PF01678, including containing a weak internal duplication. However members of this family do not contain the conserved cysteines that are hypothesised to be active site residues (Bateman A pers obs).

1: Phenazine biosynthesis in Pseudomonas fluorescens: branchpoint from the primary shikimate biosynthetic pathway and role of phenazine-1,6-dicarboxylic acid. McDonald M, Mavrodi DV, Thomashow LS, Floss HG; J Am Chem Soc 2001;123:9459-9460. PMID:11562236