Genetic aberrations are commonly seen in human preimplantation embryos. Non-disjunction and premature division of a chromosome are common in both meiosis and mitosis divisions. The expected result for meiotic aneuploidies is full aneuploidy in the later stages whereas mosaicism is the most frequent event in the cleavage and blastocyst stages. The main causes for mosaicism are post-zygotic event...

A Sigma factor gene which is important in the global regulation of heat shock responses in prokaryotes, rpoH, was isolated from Flexibacter chinesis by PCR, sequenced and compared to the rpoH genes of a variety of other organisms. The rpoH gene was 98% similar to other previously characterized genes. A mutant of rpoH was produced (JR102) which had a reduced growth rate at both low and high temp...

the skin is the largest tissue of man with several functions. cosmetics/cosmeceuticals agents always are needed to be evaluated for their detrimental effects on the skin. nowadays, the therapeutic potential of stem cells has and fibroblasts have increased the hope for a successful cell therapy in aesthetic medicine. stem cells are unspecialized cells capable of renewing themselves through cell ...

Cell Division is an open access, peer-reviewed journal that encompasses all aspects of cell cycle control and cancer in eukaryotes. Cell Division provides an online forum for the cell-cycle community by: publishing articles on all exciting aspects of cell-cycle research bridging the gap between models of cell cycle regulation, development, and cancer biology. This forum is driven by special...