Three new variants in the plasminogen system

Three new phenotypes of plasminogen system, named PLG 3-1, PLG 1-M and PLG 1-C, were found in sera from healthy Japanese persons by the agarose gel isoelectric focusing followed by the methods of immunofixation and caseinolysis. The present study indicates that at least the PLG 3 component is genetically determined. The existence of another PLG3 allele is postulated.