Mesoscopic Evaluation of DNA Mismatches in PCR Primer-Target Hybridisation to Detect SARS-CoV-2 Variants of Concern

2021 ◽  
pp. 145-150
Author(s):  
Pâmella Miranda ◽  
Vivianne Basílio Barbosa ◽  
Gerald Weber
Keyword(s):  
2015 ◽  
Vol 214 ◽  
pp. 15-24 ◽  
Author(s):  
Young Ran Nam ◽  
Uk Lee ◽  
Han Seok Choi ◽  
Kyoung Jin Lee ◽  
Nari Kim ◽  
...  

2003 ◽  
Vol 278 (32) ◽  
pp. 29587-29592 ◽  
Author(s):  
Joe A. B. McCann ◽  
Paul J. Berti
Keyword(s):  

2011 ◽  
Vol 27 (24) ◽  
pp. 3432-3434 ◽  
Author(s):  
Y. Zhou ◽  
W. Qu ◽  
Y. Lu ◽  
Y. Zhang ◽  
X. Wang ◽  
...  

Nanoscale ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 538-547 ◽  
Author(s):  
Hyungbeen Lee ◽  
Sang Won Lee ◽  
Gyudo Lee ◽  
Wonseok Lee ◽  
Kihwan Nam ◽  
...  

Here, we demonstrate a powerful method to discriminate DNA mismatches at single-nucleotide resolution from 0 to 5 mismatches (χ0 to χ5) using Kelvin probe force microscopy (KPFM).


Author(s):  
M. T. Hajiaghayi ◽  
K. Jain ◽  
L. C. Lau ◽  
I. I. Măndoiu ◽  
A. Russell ◽  
...  
Keyword(s):  

1999 ◽  
Vol 37 (2) ◽  
pp. 315-320 ◽  
Author(s):  
Francisco Hideo Aoki ◽  
Tamae Imai ◽  
Reiko Tanaka ◽  
Yuzuru Mikami ◽  
Hideaki Taguchi ◽  
...  

Thirty-three strains of Cryptococcus neoformans were isolated from clinical specimens, including specimens from AIDS patients in Brazil, and were classified into two serotypes; we detected 31 and 2 strains of serotypes A and B, respectively. Random amplified polymorphic DNA (RAPD) fingerprint pattern analyses of these strains of serotypes A and B showed that the patterns were similar for strains of each serotype when three 10-mer primers were used as the RAPD primers. Comparative studies of the fingerprint patterns of the study isolates with those of the reference strains also showed that the RAPD patterns for strains of each serotype were related and that most of the fingerprint bands existed commonly for all strains of each serotype tested. The common RAPD bands (an approximately 700-bp band for serotype A and an approximately 450-bp band for serotype B) were extracted and the DNA sequences were determined. Using this information, we prepared two and one PCR primer pairs which were expected to be specific for C. neoformans serotypes A and B, respectively. Use of each PCR primer combination thus prepared for serotype A or B was 100% successful in identifying the respectiveC. neoformans serotypes, including the 33 clinical isolates tested in the present study. Among these combinations, one for serotype A was found to amplify DNA from C. neoformans serotype B as well as serotype A. Serotype B-specific PCR primer pairs amplified DNA from not only serotype B strains but also from serotype C strains. The usefulness of other serotype-specific PCR primers for clinical C. neoformans isolates is discussed.


2004 ◽  
Vol 67 (7) ◽  
pp. 1335-1343 ◽  
Author(s):  
CHIEN-KU LIN ◽  
CHO-LIEN HUNG ◽  
SHU-CHEN HSU ◽  
CHENG-CHIH TSAI ◽  
HAU-YANG TSEN

Salmonella serovars are some of the major bacterial pathogens that can cause sporadic cases and outbreaks of foodborne illness. Based on the sequence data in the V3 region of the 16S rRNA gene, two PCR primer pairs have been designed for the detection of all serovars of Salmonella. However, none of these primers were specific for Salmonella because complete sequence homology with certain non-Salmonella strains has been found within each of them. Thus, the specificities of these two primer pairs could not rely on only one of the two primers. In this study, we modified our previous 16SFI primer by extending one base at the 5′ end and three bases at the 3′ end. The modified primer, 16S-Sal, was designed with one or more mismatched bases near the 3′ end of the primer annealing to the corresponding sequences of non-Salmonella strains. Such modification eliminates interference from Citrobacter freundii and Enterobacter cloacae as occurs with the 16SFI primer. When 16S-Sal and a degenerate primer, 16S-CCR, were used as a primer pair, detection specificity of Salmonella serovars was achieved. Because this primer pair was used for PCR detection of the salmonellae in food samples, such as whole milk and chicken meat, as low as 1 to 9 CFU/g (ml) of the food sample could be detected when a 8-h preculture step was performed prior to the PCR. For chicken meat, the endogenous microflora did not interfere with the PCR results.


2008 ◽  
Vol 9 (1) ◽  
Author(s):  
Kelvin Li ◽  
Anushka Brownley ◽  
Timothy B Stockwell ◽  
Karen Beeson ◽  
Tina C McIntosh ◽  
...  

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