The replication of herpes simplex virus type 1 (HSV-1) DNA is associated with a high degree of homologous recombination. While cellular enzymes may take part in mediating this recombination, we present evidence for an HSV-1-encoded recombinase activity. HSV-1 alkaline nuclease, encoded by the UL12 gene, is a 5'-->3' exonuclease that shares homology with Redalpha, commonly known as lambda exonuc...

Formation of higher-order structure of nucleic acids (hairpins or loops, for example) may impact not only gene regulation, but also molecular biology techniques and approaches critical for design and production of vectors needed for genetic engineering approaches. In the course of designing vectors aimed to modify the murine Foxd3 locus through homologous recombination in embryonic stem cells, ...

The construction of knockin vectors designed to modify endogenous genes in embryonic stem (ES) cells and the generation of mice from these modified cells is time consuming. The timeline of an experiment from the conception of an idea to the availability of mature mice is at least 9 months. We describe a method in which this timeline is typically reduced to 3 months. Knockin vectors are rapidly ...

We present results of spectroscopic monitoring observations the Ultra-Luminous Infra Red Galaxy F01004-2237. This galaxy was observed to undergo changes in its optical spectrum, detected by comparing a spectrum from 2015 with one 2000. These were coincident photometric brightening. The main are enhanced He II $\lambda$4686 emission and appearance I $\lambda$3898,$\lambda$5876 lines. favoured in...

The characteristic wavelength at which a visual pigment absorbs light is regulated by interactions between protein (opsin) and retinylidene Schiff base chromophore. By using site-directed mutagenesis, charged amino acids in bovine rhodopsin transmembrane helix C were systematically replaced. Substitution of glutamic acid-134 or arginine-135 did not affect spectral properties. However, substitut...

The Red recombination system of the bacteriophage lambda is a useful tool for engineering bacterial artificial chromosomes (BACs) because desired mutations can be made in any part of the DNA, even in large DNAs, independent of the presence of appropriate restriction enzyme sites. Many have tried changing the inducible promoter or decreasing the copy number of Red genes in Escherichia coli to im...

Accurate radial velocity determinations of optical emission lines (i.e. [NII]${\lambda}{\lambda}$6548,6584, H${\alpha}$, and [SII]${\lambda}{\lambda}$6717,6731) are very important for investigating the kinematics dynamics properties nebulae. The second stage survey program Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) has started a sub-survey nebulae (MRS-N) which will spec...

Staphylococcus aureus is an important human pathogen, but studies of the organism have suffered from the lack of a robust tool set for its genetic and genomic manipulation. Here we report the development of a system for the facile and high-throughput genomic engineering of S. aureus using single-stranded DNA (ssDNA) oligonucleotide recombineering coupled with clustered regularly interspaced sho...

Necrobiotic xanthogranuloma is a rare, idiopathic, and chronic systemic granulomatous disorder that is usually associated with paraproteinemia of the immunoglobulin (Ig)G kappa (κ) type. It is clinically characterized by yellowish red-to-brown indurated often ulcerating nodules or plaques that usually involve the periorbital regions of the elderly. We report an atypical case of NXG affecting on...