The selenium-containing protein, selenoprotein P (SePP) is in charge of the transport and distribution of the essential trace element selenium (Se) in the human body. Guillaume Ballihaut and colleagues from the National Institute of Standards and Technology, USA, have studied SePP that is present in human plasma and found that it exists as a mixture of at least 3 isoforms.
Multiple forms of selenoprotein P in a candidate human plasma standard reference material
Guillaume Ballihaut, Lisa E. Kilpatrick, Eric L. Kilpatrick and W. Clay Davis
Metallomics, 2012, Advance Article