Polymorphism of plasminogen in Tuscany (Italy).

The distribution of PLG phenotypes in the population of Tuscany (Central Italy) has been investigated by means of isoelectric focusing followed by immunofixation of desialyzed sera. In a random sample of 383 unrelated healthy blood donors registered at the Hospital of Pisa, three common phenotypes, PLG A, A-B, and B, and two rare variants were found. The allele frequencies calculated in our study were: PLGA = 0.6749, PLGB = 0.3225, and PLG*rare = 0.0026. The theoretical exclusion rate in cases of disputed paternity is 17.42%.