Results 151 to 160 of about 7,936,685 (347)

Metabolic Rate Calibrates the Molecular Clock: Reconciling Molecular and Fossil Estimates of Evolutionary Divergence [PDF]

open access: yesarXiv, 2004
Observations that rates of molecular evolution vary widely within and among lineages have cast doubts upon the existence of a single molecular clock. Differences in the timing of evolutionary events estimated from genetic and fossil evidence have raised further questions about the existence of molecular clocks and their use.
arxiv  

Distinct dysregulated pathways in sporadic and Lynch syndrome‐associated colorectal cancer offer insights for targeted treatment

open access: yesFEBS Letters, Volume 599, Issue 7, Page 1006-1028, April 2025.
This study explores the distinct molecular mechanisms underlying Lynch syndrome‐associated and sporadic colorectal cancer (CRC). By highlighting the therapeutic potential of targeting the PI3K‐Akt pathway in Lynch syndrome‐associated CRC and the Wnt pathway in sporadic CRC, the findings open avenues for personalised treatment strategies, aiming to ...
May J. Krause   +2 more
wiley   +1 more source

Molecular evolution research Annual report [PDF]

open access: yes
Amino acid syntheses by heating formaldehyde and ammonia mixtures in molecular evolution ...

core   +1 more source

Dynamically Driven Evolution of the Interstellar Medium in M51 [PDF]

open access: yes, 2009
Massive star formation occurs in giant molecular clouds (GMCs); an understanding of the evolution of GMCs is a prerequisite to develop theories of star formation and galaxy evolution. We report the highest-fidelity observations of the grand-design spiral
Bock, Douglas C.-J.   +22 more
core  

Genetic Mechanism of Non-Targeted-Site Resistance to Diquat in Spirodela polyrhiza

open access: yesPlants
Understanding non-target-site resistance (NTSR) to herbicides represents a pressing challenge as NTSR is widespread in many weeds. Using giant duckweed (Spirodela polyrhiza) as a model, we systematically investigated genetic and molecular mechanisms of ...
Martin Höfer   +4 more
doaj   +1 more source

A simple, general result for the variance of substitution number in molecular evolution [PDF]

open access: yesarXiv, 2016
The number of substitutions (of nucleotides, amino acids, ...) that take place during the evolution of a sequence is a stochastic variable of fundamental importance in the field of molecular evolution. Although the mean number of substitutions during molecular evolution of a sequence can be estimated for a given substitution model, no simple solution ...
arxiv  

Contrasting Rates of Molecular Evolution and Patterns of Selection among Gymnosperms and Flowering Plants

open access: yesMolecular biology and evolution, 2017
The majority of variation in rates of molecular evolution among seed plants remains both unexplored and unexplained. Although some attention has been given to flowering plants, reports of molecular evolutionary rates for their sister plant clade ...
Amanda R. De La Torre   +3 more
semanticscholar   +1 more source

Molecular phylogenetics and evolution

open access: yes, 2014
73
Munoz-Ramirez, C. P.   +5 more
openaire   +6 more sources

Immunoregulatory mechanisms of the arachidonic acid pathway in cancer

open access: yesFEBS Letters, Volume 599, Issue 7, Page 927-951, April 2025.
The central role of the arachidonic acid (AA) pathway in anticancer immunity. Enzymes and metabolites of the AA pathway can play both immunosuppressive and immunostimulatory roles in the tumor microenvironment. Therefore, their tailored targeting could be beneficial as a standalone therapy or in combination with current cancer immunotherapy.
Maria Tredicine   +3 more
wiley   +1 more source

Artificially Expanded Genetic Information Systems for New Aptamer Technologies

open access: yesBiomedicines, 2018
Directed evolution was first applied to diverse libraries of DNA and RNA molecules a quarter century ago in the hope of gaining technology that would allow the creation of receptors, ligands, and catalysts on demand.
Elisa Biondi, Steven A. Benner
doaj   +1 more source

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