[3 new allotypes of mink blood serum alpha2-lipoproteins--Lpm 6, Lpm 7, Lpm 8].

Three new allotypes were discovered in mink sera by means of isoimmunization. Based on the results of identifications, they were referred to the Lpm system of serum alpha2-lipoprotein. They were designated as Lpm 6, Lpm 7 and Lpm 8. The allotyping of serum samples from 342 minks made possible to establish a relation between Lpm 7 and Lpm 8 using the chi2 method; it was also found that these two allotypes related to each of the first five Lpm as well as to their phenotypes, which was described earlier. There was a significant dependence of the expression of Lpm 6 on Lpm 5 indicating a genetic relation between Lpm 6 and other allotypes. The detection of Lpm 6, 7 and 8, which are the most likely under the control of the same gene (or a sustem of genes) as Lpm 1, 2, 3 and 5, is an evidence for the complex structure of the Lpm locus.