Phosphatidylethanol (PEth) ELISA Kit

The petH gene, encoding ferredoxin-NADP(+) oxidoreductase (FNR), has been characterised in the unicellular cyanobacterium Synechocystis PCC 6803. Its product, FNR, was heterologously produced and functionally characterized. The start-site of the monocystronic petH transcript was mapped 523 bp upstream of the predicted PetH initiation codon, resulting in an unusually large 5'-untranslated region. The 5' end of the petH transcript is situated within the open reading frame of phosphoribulokinase (encoded by prk), which is transcribed in opposite orientation with respect to petH. The transcription start site of the prk transcript was mapped 219 bp upstream of the initiation codon, resulting in a 223 bp antisense region between both transcripts. Under many conditions the expression of both genes (i.e. petH and prk) is co-regulated symmetrically at the transcriptional level, as was concluded from both northern hybridization experiments and from primer extension analyses; it became uncoupled, however, when specifically petH expression was stimulated, independent of prk expression, by stressing the Synechocystis cells with high salt concentrations. A model for a new type of bidirectional operator, regulating the expression of petH and prk, is proposed.

At the end of each stadium, insects undergo a precisely orchestrated process known as ecdysis which results in the replacement of the old cuticle with a new one. This physiological event is necessary to accommodate growth in arthropods since they have a rigid chitinous exoskeleton. Ecdysis is initiated by the direct action of Ecdysis Triggering Hormones on the central nervous system. Choristoneura fumiferana is a major defoliator of coniferous forests in Eastern North America. It is assumed that, studies on the ecdysis behavior of this pest might lead to the development of novel pest management strategies. Hence in this study, the cDNA of CfETH was cloned. The open reading frame of the cDNA sequence was found to encode three putative peptides viz., Pre-Ecdysis Triggering Hormone (PETH), Ecdysis Triggering Hormone (ETH), and Ecdysis Triggering Hormone Associated Peptide (ETH-AP). The CfETH transcript was detected in the epidermal tissue of larval and pupal stages, but not in eggs and adults. In order to explore the structural conformation of ETH, ab initio modelling and Molecular Dynamics (MD) Simulations were performed. Further, a library of insecticides was generated and virtual screening was performed to identify the compounds displaying high binding capacity to ETH. (C) 2016 Elsevier B.V. All rights reserved.