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The transcriptional regulation of gene expression is a primary means by which insects adapt to a changing environment. The evolution of insecticide resistance is conferred through mechanisms, typically requiring the interaction of multiple genes. Consequently, the characterization of gene regulation and interactions in resistance is fundamental for achieving an understanding of the complex processes...
Neurotrophins are structurally related proteins regulating brain development and function. Molecular evolution studies of neurotrophins and their receptors are essential for understanding the mechanisms underlying the coevolution processes of these gene families and how they correlate with the increased complexity of the vertebrate nervous system. In order to improve our current knowledge of the molecular...
Two related satellite DNA families (satellite I and satellite II) with complex higher-order repeat (HOR) monomers represent major DNA components equilocated in the pericentromeric heterochromatin of all Tribolium madens chromosomes. Fragments obtained upon genomic DNA restriction revealed two subfamilies of satellite II monomers, and also identified regions of transition between satellite I and satellite...
Little is known about the evolution of the intron–exon organization in the more primitive groups of land plants, and the intron distribution among Plantae (glauco-, rhodo-, chloro- and streptophytes) has not been investigated so far. The present study is focused on some key species such as the liverwort Marchantia polymorpha, representing the most ancient lineage of land plants, and the streptophycean...
Auxin response factors (ARFs) are transcription factors that bind with specificity to TGTCTC-containing auxin response elements (AuxREs) found in promoters of primary/early auxin response genes and mediate responses to the plant hormone auxin. The ARF genes are represented by a large multigene family in plants. A comprehensive genome-wide analysis was carried out in this study to find all ARFs in...
For the first time the complete mitochondrial genome was sequenced for a member of Lacertidae. Lacerta viridis viridis was sequenced in order to compare the phylogenetic relationships of this family to other reptilian lineages. Using the long-polymerase chain reaction (long PCR) we characterized a mitochondrial genome, 17,156 bp long showing a typical vertebrate pattern with 13 protein coding genes,...
In this study, the complete nucleotide sequence (17,962 bp) of the mitochondrial DNA of Amolops tormotus was determined using polymerase chain reaction (PCR). The gene content, base composition and codon usage of A. tormotus conformed to those of typical vertebrate patterns. Among 22 tRNAs, the novel position of the tRNA-His gene was in the D-loop region, which was a novel mtDNA gene rearrangement...
Shrimp of the family Atyidae are important members of nearly all tropical (and most temperate) fresh and brackish water ecosystems in the world. To date, a complete mitochondrial genome from this important crustacean group has not been reported. Here, we present the complete mitochondrial DNA sequence of the Hawaiian atyid Halocaridina rubra [Holthuis, L.B., 1963. On red coloured shrimps (Decapoda,...
Skophammer et al. [Skophammer, RG, Herbold, CW, Rivera, MC, Servin, JA, Lake, JA. 2006. Evidence that the root of the tree of life is not within the Archaea. Mol Biol Evol, 23, 1648–1651] report evidence suggesting that the tree of life cannot be rooted within the Archaea domain. I have observed that an alignment used in their analysis is not reliable and that, therefore, their conclusions are unjustified.
High levels of inter-specific diversity are expected due to genetic isolation, the reproductive or geographical barriers, which lead to the accumulation of nucleotide variation. However, high levels of genetic variation are repeatedly observed even within species, notably at loci of the human major histocompatability complex and of plant resistance genes. Are molecular isolations responsible for the...
The genes encoding orotate phosphoribosyltransferase (OPRT) and orotidine-5′-monophosphate decarboxylase (OMPDC), the fifth and sixth enzymes in the de novo pyrimidine biosynthetic pathway, are fused as OPRT–OMPDC in most eukaryotic groups. On the other hand, the inversely linked OMPDC–OPRT fusion is present in trypanosomatids, belonging to kinetoplastids together with bodonids in a supergroup, Euglenozoa...
The isochore structure of a genome is observable by variation in the G+C (guanine and cytosine) content within and between the chromosomes. Describing the isochore structure of vertebrate genomes is a challenging task, and many computational methods have been developed and applied to it. Here we apply a well-known least-squares optimal segmentation algorithm to isochore discovery. The algorithm finds...
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