or
Invitrogen Serpin A4 Human ELISA Kit, Sample Type: Plasma, Serum, Supernatant, Target Species: Human, Accession Number: P29622, Assay Range: 0.143-35 ng/mL, Assays: Solid-phase sandwich ELISA, Calibration Range: 0.12ng/mL to 35ng/mL, Conjugate: Biotin