We demonstrate the molding of single DNA molecules in 8 nm thin platinum molds. The molded structures have an apparent depth of 1 nm under STM imaging, and closely follow the contours of the DNA molecules. We have confirmed the presence of the embedded molecules and have verified the ability of this technique to scale down to single molecules. Additionally, we have utilized this method to perform electron tunneling analysis on embedded DNA molecules.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/IEMBS.2009.5333862 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Characterisation of a Betasatellite Associated With Tomato Yellow Leaf Curl Guangdong Virus and Discovery of an Unusual Modulation of Virus Infection Associated With C4 Protein.
Mol Plant Pathol
January 2025
Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China.
Tomato yellow leaf curl Guangdong virus (TYLCGdV), a monopartite begomovirus first identified in 2004, remains poorly characterised. In this study, we demonstrate that TYLCGdV associates with a betasatellite, TYLCGdB, and the βC1 protein encoded by TYLCGdB is essential for symptom development. We also explore the role of TYLCGdV C4 protein by generating a C4-deficient infectious clone (TYLCGdV), revealing a dynamic role for TYLCGdV C4.
View Article and Find Full Text PDFNovel Dehydroabietylamine C-Ring Schiff Base Derivatives: Synthesis, Antiproliferative activity, DNA binding and Molecular docking.
Chem Asian J
January 2025
Nanjing Forestry University, College of Science, CHINA.
A series of Dehydroabietylamine (DHAA) C-ring Schiff derivatives, L3-L20, were synthesized and their in vitro cytotoxic activity against the human tumor cell lines cervix HeLa, breast MCF-7, lung A549, liver HepG2, and the nonmalignant cell line umbilical vein HUVEC was investigated. Most of the compounds showed varying degrees of anticancer activity against HeLa cell lines while demonstrating lower toxicity to normal HUVEC cells compared to DHAA and doxorubicin (DOX), especially compound L19, which not only enhanced the anticancer activity of DHAA, but also significantly reduced the toxicity to normal cells, achieving a selectivity index (SI) 118 times higher than that of DHAA and 245 times higher than that of DOX. In addition, compound L19 induced apoptosis in HeLa cells in a dose-dependent manner and arrested the cell cycle in S phase.
View Article and Find Full Text PDFPresence of the Anopheles culicifacies complex species A in southeast Iran.
Trop Med Health
January 2025
Department of Vector Biology and Control of Diseases, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Background: The Anopheles culicifacies complex is one of the most important malaria vectors in Southeast Asia and Southeastern Iran. Although the sibling species within this complex are morphologically indistinguishable, they differ significantly in their disease transmission potential, blood-feeding behaviour, and other biological traits. Cytogenetic and chromosomal studies have identified five sibling species within this complex: A, B, C, D, and E.
View Article and Find Full Text PDFSero-molecular prevalence of toxoplasmosis in hemodialysis and peritoneal dialysis patients in Markazi Province, Iran.
Trop Med Health
January 2025
Infectious Diseases Research Center, Arak University of Medical Sciences, Arak, Iran.
Background: Infectious diseases, particularly parasitic infections such as toxoplasmosis, contribute significantly to the morbidity and mortality of hemodialysis patients. Toxoplasma gondii infection poses serious risks, especially to immunocompromised individuals. This study aimed to assess the prevalence of latent toxoplasmosis in dialysis patients in Markazi Province, Iran.
View Article and Find Full Text PDFExome sequencing reveals a rare damaging variant in GRIN2C in familial late-onset Alzheimer's disease.
Alzheimers Res Ther
January 2025
Department of Neuroscience "Rita Levi Montalcini", University of Turin, Via Cherasco 15, Turin, 10126, Italy.
Background: Alzheimer's disease (AD) is a progressive neurodegenerative disorder with both genetic and environmental factors contributing to its pathogenesis. While early-onset AD has well-established genetic determinants, the genetic basis for late-onset AD remains less clear. This study investigates a large Italian family with late-onset autosomal dominant AD, identifying a novel rare missense variant in GRIN2C gene associated with the disease, and evaluates the functional impact of this variant.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!