Nucleotide sequences of hypervariable segment I (HVS I) of the mitocho
ndrial DNA (mtDNA) control region were determined for 23 eastern Slavs
residing in Magadan, northeastern Asia. A high diversity of HVS I typ
es was observed: each mtDNA analyzed has a unique nucleotide sequence.
The types of HVS I revealed were shown to be widespread in the Caucas
ian population. Eight types of HVS I are identical to those in Caucasi
ans from the Middle East and southern Europe. Taking into account the
data obtained on mtDNA types in the world Caucasian population, the pr
oblem of the origin and differentiation of peoples of the Indo-Europea
n language family is discussed.