[Human embryonic stem cells. Problems and perspectives].

Establishment of human embryonic stem cell lines is one the major achievements in the biological science in the XX century and has excited a wide scientific and social response as embryonic stem cells can be regarded in future as unlimited source of transplantation materials for the replacement cell therapy. To date human embryonic cell lines are obtained in more than 20 countries. In our country the embryonic stem cell researches are carried out in the Institute of Cytology RAS and the Institute of Gene Biology RAS.

Electrophoretic karyotypes of some species of the genus Leptomonas (kinetoplastida, trypanosomatidae), homoxenous trypanosomatids parasites of insects.

Electrophoretic karyotypes of homoxenous trypanosomatids Leptomonas peterhoffi, L. mycophilus, L. nabiculae and Leptomonas sp.

[Search for micromycetes--producers extracellular catalase and study of conditions of its synthesis].

Production of extracellular catalase by microscopic mycelial fungi (255 strains) belonging to different taxonomic groups was studied. Producers of extracellular catalase were found among fungi of the genera Penicillium, Talaromyces and Aspergillus. Strains of the genus Penicillium were the most active producers.