| Description | Enzyme immunoassay for the determination of L-kynurenine in serum and EDTA-plasma samples to evaluate L-kynurenine homeostasis. For research use only, not for use in diagnostic procedures. | Solid phase sandwich ELISA for the determination of human soluble a-Klotho in serum and EDTA-plasma. For research use only, not for use in diagnostic procedures. | Radioimmunoassay (RIA) for the determination of human IGFBP-3 in serum, plasma, or other human biological fluids (e.g. follicular fluid, seminal plasma). For research use only, not for use in diagnostic procedures. | Inquire | Solid phase competitive enzyme immunoassay (ELISA) for the determination of free Thyroxine (fT4) in human serum. For research use only, not for use in diagnostic procedures. |