Lipofectamine 2000,
Expi293™ Expression System Kit,
Opti-MEM, phosphate-buffered saline (PBS), versene, and
penicillin-streptomycin were purchased from Invitrogen (Waltham, MA, U.S.A.).
Dulbecco’s modified Eagle’s medium (DMEM), bovine calf serum (BCS), and
bovine serum albumin (BSA) were purchased from Sigma-Aldrich (St. Louis, MO, U.S.A.). The restriction enzymes HindIII, ClaI, SfiI, and SalI were purchased from BioLabs, Inc. (Ipswich, MA, U.S.A.). Biotin-conjugated monoclonal mouse anti-PEG antibodies (AGP3-biotin (IgM type) and 3.3-biotin (IgG type)) were provided by Dr. Steve R. Roffler (Academia Sinica, Taipei, Taiwan)
55 (link). FITC-conjugated goat anti-mouse immunoglobulin G Fcγ antibody,
horseradish peroxidase (HRP)-conjugated streptavidin, and HRP-conjugated goat anti-mouse IgG Fcγ antibody were purchased from Jackson Immuno Research Labs (West Grove, PA, U.S.A.).
BALB/c 3T3 cells (American Type Culture Collection, Manassas, VA, U.S.A.) were maintained at 37 °C with 5% CO
2 and grown in culture medium containing DMEM, 10% BCS, and 100 units/mL of
penicillin and streptomycin (Invitrogen, Calsbad, CA, U.S.A.). Expi293 cells were maintained in
Expi293 Expression Medium (Invitrogen, Calsbad, CA, U.S.A.) at 37 °C and 120 rpm.
Chen Y.J., Chen M., Hsieh Y.C., Su Y.C., Wang C.H., Cheng C.M., Kao A.P., Wang K.H., Cheng J.J, & Chuang K.H. (2018). Development of a highly sensitive enzyme-linked immunosorbent assay (ELISA) through use of poly-protein G-expressing cell-based microplates. Scientific Reports, 8, 17868.