[Probable position of MN gene locus on the human karyotype].

Kariotype of the propositus and his father revealed a balanced reciprocal translocation between long arm of a chromosome No. 2, and the long arm of a No 19-20, so that their complements were 46, XY, t(2q-; 19--20q+). There is no connection with congenital malformations of the propositus, but his and kariotype of his father, as well as blood group pedigree of all members of his family, suggests, likewise to assertion of German and coworkers, that locus for the MN gene is on the long arm of the chromosome No 2.