This family includes the enzyme type 2 phosphatidic acid phosphatase (PAP2), Glucose-6-phosphatase EC:3.1.3.9, Phosphatidylglycerophosphatase B EC:3.1.3.27 and bacterial acid phosphatase EC:3.1.3.2. The family also includes a variety of haloperoxidases [1,2] that function by oxidising halides in the presence of hydrogen peroxide to form the corresponding hypohalous acids.

1: Identification of a novel phosphatase sequence motif. Stukey J, Carman GM; Protein Sci 1997;6:469-472. PMID:9041652

2: An unexpected structural relationship between integral membrane phosphatases and soluble haloperoxidases. Neuwald AF; Protein Sci 1997;6:1764-1767. PMID:9260289

3: X-ray structure of a vanadium-containing enzyme: chloroperoxidase from the fungus Curvularia inaequalis. Messerschmidt A, Wever R; Proc Natl Acad Sci U S A 1996;93:392-396. PMID:8552646