The Xenopus laevis gene tumorhead (TH) is a regulator of cell proliferation of the ectodermal germ layer during embryonic development. TH overexpression results in increased cell proliferation within the developing ectoderm, causing an expansion of the neural plate. Conversely, loss of TH function results in inhibition of proliferation of ectodermal cells. Embryos with altered levels of TH prot...

present paper is the second publication introducing the paleoparasitological findings from animal coprolites obtained from archeological site of chehrabad salt mine in northwest-ern iran. the current archeological site is located in northwest of iran , dated to the sas-sanian era (4 th /5 th century ce).in the summer 2012 the carnivore coprolite was obtained within the layers in the mine and we...

On ly recen tly h as it becom e common to determ in e eukaryotic gen om ic sequen ces large en ough to con tain several gen es. With th ese data com es a n ew problem for gen e fin din g program s: to partit ion a set of exon s correctly am on g several gen es. On e lin e of developm en t in eukaryot ic gen e iden tification begin s with codin g region iden tificat ion by statist ical m ean s a...

The Acanthamoeba myosin-IA heavy chain gene encodes a 134-kDa protein with a catalytic domain, three potential light chain binding sites, and a tail with separately folded tail homology (TH) -1, -2, and -3 domains. TH-1 is highly resistant to trypsin digestion despite consisting of 15% lysine and arginine. TH-2/3 is resistant to alpha-chymotrypsin digestion. The peptide link between TH-1 and TH...