<unk>  are a group of globular proteins in plasma that 
are more mobile in alkaline or electricaly charged solutions than gamma<unk> , but less mobile than alpha<unk> .
Examples of<unk>  include:
beta-2 microglobulin
plasminogen
angiostatins
properdin
sex hormone binding<unk> transferrin
Beta globulins
Globulin
Hemoglobin
Gamma globulin
Fetal hemoglobin
Beta-2 transferrin
Immunoglobulin G
Methaemoglobin