| Description | Radioimmunoassay (RIA) for the determination of Free Testosterone in human serum. For research use only, not for use in diagnostic procedures. | Enzyme immunoassay (ELISA) for the determination of IgG class antibodies against Trypanosoma cruzi in human serum or plasma (citrate, heparin). For research use only, not for use in diagnostic procedures. | Inquire | Enzyme immunoassay (ELISA) for the determination of Leptin in human serum, plasma, urine and saliva. For research use only, not for use in diagnostic procedures. | Enzyme immunoassay (ELISA) for the determination of Tryptophan in urine, serum, and plasma. For research use only, not for use in diagnostic procedures._x000D_ |