A spectral sequence is established whose $E_{2}$ page Bar-Natan's variant of Khovanov homology and which abuts to a deformation instanton for knots links. This arises as specialization characteristic-2 version $F_{5}$ in Khovanov's classification.

Virulence in Shigella spp., as well as in strains of enteroinvasive Escherichia col, is regulated by growth temperature. Previously, virR had been identified as the gene controlling the temperature-regulated expression of Shigella virulence. Since ShigeUa spp. and E. coli are also known to share >90% DNA sequence homology, we sought to determine if nonpathogenic E. coli K-12 C600 contains a gen...

A method of quantitative comparison of two classi cations rules applied to protein folding problem is presented. Classi cation of proteins based on sequence homology and based on amino acid composition were compared and analyzed according to this approach. The coe cient of correlation between these classi cation methods and the procedure of estimation of robustness of the coe cient are discussed.

the genus onobrychis is subdivided into two subgenera: onobrychis and sisyrosema. phylogenetic relationships of 19 species of onobrychis (fabaceae: tribe hedysareae) and one representative each of genera eversmannia and ebenus were estimated from dna sequences of the internal transcribed spacer (its) region. parsimony analysis of the its region formed a dendrogram with strong bootstrap support ...

The database of known protein three-dimensional structures can be significantly increased by the use of sequence homology, based on the following observations. (1) The database of known sequences, currently at more than 12,000 proteins, is two orders of magnitude larger than the database of known structures. (2) The currently most powerful method of predicting protein structures is model buildi...

The venoms of Buthidae scorpions are known to contain basic, single-chain protein -toxins consisting of 60-70 amino acid residues that are tightly cross-linked by four disulfide bridges. Total RNA was extracted from the venom glands of scorpion Mesobuthus eupeus collected from the Khuzestan province of Iran and then cDNA was synthesized with the modified oligo (dT) primer and extracted total R...

sequence analysis and phylogenetic study of hemagglutinin (ha) gene of h9n2 subtype of avian influenza virus isolates (outbreaks of 1998-2002) in tehran province (iran) were studied. two sets of forward and reverse primers in highly conserved regions, based on sequences of ha gene in genbank, were designed. pcr products of a 430-bp fragment of 16 isolates were sequenced and then were aligned wi...

Using a modified foam evaluation, we give categorification of the Alexander polynomial knot. We also purely algebraic version this knot homology which makes it appear as infinite page spectral sequence starting at reduced triply graded link Khovanov--Rozansky.

In the classical Batalin–Vilkovisky formalism, BV operator $$\Delta $$ is a differential of order two with respect to commutative product. graded setting, it known that if homotopically trivial, then there tree level cohomological field theory induced on homology; this manifestation fact homotopy quotient operad algebras by represented hypercommutative algebras. paper, we study generalized wher...

In this paper we present the full details of construction a Morse–Floer type homology related to superquadratic perturbation Dirac-geodesic model. This is computed explicitly using Leray–Serre spectral sequence and computation leads us several existence results Dirac-geodesics.