The function of Ensembl gene identifier ENSG00000129103 (SUMF2, sulfatase modifying factor 2) is as follows. Lacks formylglycine generating activity and is unable to convert newly synthesized inactive sulfatases to their active form. Inhibits the activation of sulfatases by SUMF1. {ECO:0000269|PubMed:12757706, ECO:0000269|PubMed:15708861, ECO:0000269|PubMed:15962010}.