[Determination of adenylate kinase (AK) phenotypes in blood stains]

The author examined blood spots, prepared experimentally with known types of the enzyme adenyl kinase (AK) 1-1 and 2-1 on the most frequently met in the practice materials-carriers: cloth, paper, wood, knife, glass and stone. The studies were performed by means of electrophoresis on cellulose acetate folio. She found that the types of AK could well be determined with spot duration of 5-6 months, saturating the material (cloth, paper), and over 1 year in the presence of crusts of dried blood, regardless of the material-carrier (including cloth and paper). She recommends that the system AK should be introduced in the practice during examination of blood spots at experts' reports according to material evidences. In view of phenotype frequencies of AK in our country the theoretical probability for two blood spots, randomly taken, to differ only by AK is 12.85%.