SDS-polyacrylamide gels of FTE (A), FTEII (B), and FBA (C) phytases concentrated by ultrafiltration and treated with or without endo Hf. Lanes M, molecular size marker. (A) Lanes: 1, endo Hf; 2, FTE treated with endo Hf; 3, FTE without endo Hf treatment. (B) Lanes: 1, FTEII treated with endo Hf; 2, endo Hf; 3, FTEII without endo Hf treatment. (C) Lanes: 1, FBA treated with endo Hf; 2, FBA without endo Hf treatment; 3, endo Hf.