Results 51 to 60 of about 230,805 (269)

The deepest splits in Chloranthaceae as resolved by chloroplast sequences [PDF]

open access: yes, 2003
Evidence from the fossil record, comparative morphology, and molecular phylogenetic analyses indicates that Chloranthaceae are among the oldest lineages of flowering plants alive today. Their four genera (ca.
Renner, Susanne S., Zhang, Li-Bing
core   +1 more source

Tangle analysis of difference topology experiments: applications to a Mu protein-DNA complex

open access: yes, 2007
We develop topological methods for analyzing difference topology experiments involving 3-string tangles. Difference topology is a novel technique used to unveil the structure of stable protein-DNA complexes involving two or more DNA segments.
Arsuaga   +19 more
core   +1 more source

Major G-Quadruplex Form of HIV-1 LTR Reveals a (3 + 1) Folding Topology Containing a Stem-Loop [PDF]

open access: yes, 2018
Nucleic acids can form noncanonical four-stranded structures called G-quadruplexes. G-quadruplex-forming sequences are found in several genomes including human and viruses.
Anh Tuân Phan   +6 more
core   +2 more sources

Topological Process of Splitting DNA-Links

open access: yesBIOMATH, 2022
A DNA replicon is modeled by a special type of 2-component link, called a DNA-link, in which two circles form a double helix around a trivial center core curve. The DNA replication process is semi-conservative, which is interpreted as a splitting process of the DNA-link.
Abdul Adheem Mohamad, Tsukasa Yashiro
openaire   +3 more sources

Construction, analysis, ligation, and self-assembly of DNA triple crossover complexes [PDF]

open access: yes, 2000
This paper extends the study and prototyping of unusual DNA motifs, unknown in nature, but founded on principles derived from biological structures.
Kopatsch, Jens   +6 more
core   +1 more source

Topological data analysis of Escherichia coli O157:H7 and non-O157 survival in soils. [PDF]

open access: yes, 2014
Shiga toxin-producing E. coli O157:H7 and non-O157 have been implicated in many foodborne illnesses caused by the consumption of contaminated fresh produce.
Crowley, David E   +6 more
core   +2 more sources

Transcriptional network analysis of PTEN‐protein‐deficient prostate tumors reveals robust stromal reprogramming and signs of senescent paracrine communication

open access: yesMolecular Oncology, EarlyView.
Combining PTEN protein assessment and transcriptomic profiling of prostate tumors, we uncovered a network enriched in senescence and extracellular matrix (ECM) programs associated with PTEN loss and conserved in a mouse model. We show that PTEN‐deficient cells trigger paracrine remodeling of the surrounding stroma and this information could help ...
Ivana Rondon‐Lorefice   +16 more
wiley   +1 more source

Common lizards break Dollo’s law of irreversibility: genome-wide phylogenomics support a single origin of viviparity and re-evolution of oviparity [PDF]

open access: yes, 2018
Dollo’s law of irreversibility states that once a complex trait has been lost in evolution, it cannot be regained. It is thought that complex epistatic interactions and developmental constraints impede the re-emergence of such a trait.
Elmer, Kathryn R.   +2 more
core   +1 more source

Measuring the degree of starshape in genealogies - summary statistics and demographic inference [PDF]

open access: yes, 2009
The degree of starshape of a genealogy is readily detectable using summary statistics and can be taken as a surrogate for the effect of past demography and other non-neutral forces.
Baudry   +22 more
core   +1 more source

Topology of Viral DNA

open access: yes, 2010
Chromosome organization plays a key role in many biological processes. In viruses genome organization is essential for the packaging and releasing of the genome as well as for maintaining the stability of the viral capsid. This organization varies across different families and is highly dependent on the virus morphogenetic pathway (Casjens, 1997).
Arsuaga, Javier   +2 more
openaire   +2 more sources

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