Human Plasma Protein Levels


Plasma Protein Normal Plasma Range (mg/dl)
Albumin 3,500 - 4,500
Prealbumin (Transthyretin) 10 - 40
α1-Globulins 300 - 600
  • α1-Acid Glycoprotein (orosomucoid)
  • Retinol Binding Protein
  • α-Fetoprotein
  • Thyroxine Binding Globulin
  • Transcortin
55 - 140
3 - 6
approx. 0.001
1 - 2
3 - 3.5
α2-Globulins (excluding lipoproteins) 400 - 900
  • Ceruloplasmin
  • Haptoglobin Type 1-1
  • Haptoglobin Type 2-1
  • Haptoglobin Type 2-2
15 - 60
100 - 220
160 - 300
120 - 260
β-Globulins (excluding lipoproteins) 600 - 1,100
  • Transferrin
  • Hemopexin
  • β2-Microglobulin
  • C-Reactive Protein
200 - 320
50 - 100
approx. 0.2
< 1
γ-Globulins 700 - 1,500