[Genetic variability and phylogenetic analysis of 39 short tandem repeat loci in Beijing Han population].

In this study, we studied the genetic polymorphisms of short tandem repeat (STR) loci from 13 CODIS and 26 non-CODIS system in Beijing Han population for the first time, and established a database of 39 STR loci whose forensic parameters were further evaluated. Our results demonstrated no significant deviation from the Hardy-Weinberg equilibrium of 39 STR loci and no pairwise linkage disequilibrium between them. The power of discriminations, expected heterozygosity, polymorphic information content, and power of exclusion of 39 STR loci ranged from 0.

[A new method of identifying the peripheral blood and the menstrual blood].

Objective: To explore the tissue-specific gene expressions of the peripheral blood and the menstrual blood, and to search some specific factors to establish an effective method for identifying the peripheral blood and the menstrual blood.

Methods: The specific products of the peripheral blood and the menstrual blood were detected by RT-PCR and separated by electrophoretic technology.

Results: Beta-spectrin (SPTB) as one specific marker of peripheral blood and 18S rRNA as a kind of the housekeeping gene were expressed in both the peripheral blood and the menstrual blood.